A. DALE KAISER, Ph.D. Professor of Biochemistry and Developmental Biology Stanford University School of Medicine Stanford, California 94305-5427 EDUCATION B.S., Purdue University, West Lafayette, Indiana, Science, 1950 Ph.D., California Institute of Technology, Pasadena, California, Biology and Chemistry 1955 PROFESSIONAL BACKGROUND 1950-52 Graduate Assistant, California Institute of Technology 1952-54 Predoctoral Fellow, National Foundation for Infantile Paralysis 1954-56 Fellow of the American Cancer Society, Service de Physiologie Microbienne, Institute Pasteur, Paris, France 1956-58 Instructor, Department of Microbiology, Washington University School of Medicine, St. Louis, Missouri 1958-59 Assistant Professor, Department of Microbiology, Washington University 1959-61 Assistant Professor, Department of Biochemistry, Stanford University, School of Medicine, Stanford, California 1961-66 Associate Professor of Biochemistry, Stanford University School of Medicine 1966Professor of Biochemistry, Stanford University School of Medicine 1989Professor of Biochemistry and of Developmental Biology, Stanford University School of Medicine PUBLICATIONS 1. Kaiser, A.D. (1955). A genetic study of the temperate Coliphage . Virology 1:424-443. 2. Kaiser, A.D. (1956). Cooperation de deux Mutants d’un Bacteriophage pour Lysogenisation. Comptes Rendus Academie des Sciences Francaise 242:3129-3131. 3. Kaiser, A.D. (1957). Mutations in temperate bacteriophage affecting its ability to lysogenize Escherichia coli. Virology 3:42-61. 4. Kaiser, A.D. and Jacob, F. (1957). Recombination between related temperate phages and genetic determination of immunity specificity and prophage localization. Virology 4:509-521. 5. Kaiser, A.D. and Hogness, D.S. (1960). The transformation of Escherichia coli with deoxyribonucleic acid isolated from bacteriophage dg. J. Mol. Biol. 2:392-415. 6. Josse, J., Kornberg, A. and Kaiser, A.D. (1961). Enzymatic synthesis of deoxyribonucleic acid. VIII. Frequencies of nearest neighbor base sequences in DNA. J. Biol. Chem. 236:864-875. 7. Kaiser, A.D. (1962). The production of phage chromosome fragments and their capacity for genetic transfer. J. Mol. Biol. 4:275-287. 8. Kaiser, A.D. and Baldwin, R.L. (1962). A relation between dinucleotide and base frequencies in bacterial DNAs. J. Mol. Biol. 4:418-419. A. Dale Kaiser 9. Kaiser, A.D., Tabor, H. and Tabor, C.W. (1963). Spermine protection of coli-phage DNA against breakage by hydrodynamic shear. J. Mol. Biol. 6:141-147. 10. Adler, J. and Kaiser, A.D. (1963). Mapping of the galactose genes of Escherichia coli by transduction with phage P1. Virology 19:117-126. 11. Radding, C.M. and Kaiser, A.D. (1963). Gene transfer by broken molecules of DNA: activity of the left half-molecule. J. Mol. Biol. 7:225-233. 12. Bode, V.C. and Kaiser, A.D. (1965). Repression of the CII and CIII cistrons of phage lambda in a lysogenic bacterium. Virology 25:111-121. 13. Bode, V.C. and Kaiser, A.D. (1965). Changes in the structure and activity of DNA in a superinfected immune bacterium. J. Mol. Biol. 14:399-417. 14. Kaiser, A.D. and Inman, R.B. (1965). Cohesion and the biological activity of bacteriophage lambda DNA. J. Mol. Biol. 13:78-91. 15. Strack, H.B. and Kaiser, A.D. (1965). On the structure of the ends of lambda DNA. J. Mol. Biol. 12:36-49. 16. Kaiser, A.D. (1966). On the internal structure of bacteriophage lambda. J. Gen. Physiol. 49:171178. 17. Wu, R. and Kaiser, A.D. (1967). Mapping the 5'-terminal nucleotides of the DNA of bacteriophage and related phages. Proc. Natl. Acad. Sci. USA 57:170-177. 18. Little, J.W., Lehman, I.R. and Kaiser, A.D. (1967). An exonuclease induced by bacteriophage . I. Preparation of the crystalline enzyme. J. Biol. Chem. 242:672-678. 19. Liedke-Kulke, M. and Kaiser, A.D. (1967). Genetic control of prophage insertion specificity in bacteriophages and 21. Virology 32:465-474. 20. Liedke-Kulke, M. and Kaiser, A.D. (1967). The c-region of Coliphage 21. Virology 32:475-481. 21. Wu, R. and Kaiser, A.D. (1968). Structure and base sequence in the cohesive ends of bacteriophage lambda DNA. J. Mol. Biol. 35:523-537. 22. Kaiser, A.D. and Wu, R. (1968). Structure and function of DNA cohesive ends. Cold Spring Harbor on Quant. Biol. 33:729-734. 23. Matsubara, K. and Kaiser, A.D. (1968). dv: An autonomously replicating DNA fragment. Cold Spring Harbor on Quant. Biol. 33:769-775. 24. Mackinlay, A.G. and Kaiser, A.D. (1969). DNA replication in head mutants of bacteriophage . J. Mol. Biol. 39:679-683. 25. Kaiser, A.D. and Masuda, T. (1970). Evidence for a prophage excision gene in . J. Mol. Biol. 47:557-564. 26. Kaiser, A.D. and Masuda, T. (1970). Specificity in curing by heterimmune superinfection. Virology 40:522-529. 27. Casjens, S., Hohn, T. and Kaiser, A.D. (1970). Morphological proteins of phage lambda: Identification of the major head protein as the product of gene E. Virology 42:496-507. 2 A. Dale Kaiser 28. Kaiser, A.D. (1970). Two sequence-specific DNA-protein recognition systems. In: The Neurosciences (ed., F.O. Schmitt), pp. 955-962. 29. Heinemann, S.F. and Spiegelman, W.G. (1970). Control of transcription of the repressor gene in bacteriophage lambda. Proc. Natl. Acad. Sci. USA 67:1122-1129. 30. Heinemann, S.F. and Spiegelman, W.G. (1970). Role of gene N product in phage Lambda. Cold Spring Harbor on Quant. Biol. 35:315-318. 31. Spiegelman, W.G., Heinemann, S.F., Brachet, P., Pereira DaSilva, L and Eisen, H. (1970). Regulation of the synthesis of phage lambda repressor. Cold Spring Harbor on Quant. Biol. 35:325-330. 32. Reichardt, L. and Kaiser, A.D. (1971). Control of repressor synthesis. Proc. Natl. Acad. Sci. USA 68:2185-2189. 33. Georgopoulos, C.P. (1971). Bacterial mutants in which the gene N function of bacteriophage lambda is blocked have an altered RNA polymerase. Proc. Natl. Acad. Sci. USA 68:2977-2981. 34. Kaiser, D. (1971). Lambda DNA Replication. In: The Bacteriophage Lambda (ed. A.D. Hershey), Cold Spring Harbor Press, New York, Chapter 9, pp. 195-210. 35. Georgopoulos, C.P. (1971). A bacterial mutation affecting N function. In: The Bacteriophage Lambda (ed. A.D. Hershey), Cold Spring Harbor Press, New York, pp. 639-645. 36. Berg, D.E. (1971). Regulation in phage with duplications of the immunity region. In: The Bacteriophage Lambda (ed. A.D. Hershey), Cold Spring Harbor Press, New York, pp. 667-678. 37. Casjens, S. (1971). The morphogenesis of the phage lambda head: The step controlled by gene F. In: The Bacteriophage Lambda (ed. A.D. Hershey), Cold Spring Harbor Press, New York, pp. 725-732. 38. Ordal, G.W. (1971). Supervirulent mutants and the structure of operator and promoter. In: The Bacteriophage Lambda (ed. A.D. Hershey), Cold Spring Harbor Press, New York, pp. 565-570. 39. Wake, R.G., Kaiser, A.D. and Inman, R.B. (1972). Isolation and structure of phage head-mutant DNA. J. Mol. Biol. 64:519-540. 40. Casjens, S., Hohn, T. and Kaiser, A.D. (1972). Head assembly steps controlled by genes F and W in bacteriophage . J. Mol. Biol. 64:551-563. 41. Spiegelman, W.G., Reichardt, L.F., Yaniv, M., Heinemann, S.F., Kaiser, A.D. and Eisen, H. (1972). Bidirectional transcription and the regulation of phage repressor synthesis. Proc. Natl. Acad. Sci. USA 69:3156-3160. 42. Georgopoulos, C.P., Hendrix, R.W., Kaiser, A.D. and Wood, W.B. (1972). Role of the host cell in bacteriophage morphogenesis: Effects of a bacterial mutation on T4 head assembly. Nature New Biology 239:38-41. 43. Brody, T. (1973). A DNA-binding form of the main structure protein of lambda heads. Virology 54:441-451. 44. Georgopoulos, C.P., Hendrix, R.W., Casjens, S.R. and Kaiser, A.D. (1973). Host participation in bacteriophage lambda head assembly. J. Mol. Biol. 76:45-60. 45. Kaiser, A.D. and Masuda, T. (1973). In vitro assembly of bacteriophage lambda heads. Proc. Natl. Acad. Sci. USA 70:260-264. 3 A. Dale Kaiser 46. Lobhan, P.E. and Kaiser, A.D. (1973). Enzymatic end-to-end joining of DNA molecules. J. Mol. Biol. 78:453-471. 47. Ordal, G.W. and Kaiser, A.D. (1973). Mutations in the right operator of bacteriophage lambda: Evidence for operator-promoter interpenetration. J. Mol. Biol. 79:709-722. 48. Schedl, P. and Primakoff, P. (1973). Mutants of Escherichia coli Thermosensitive for the synthesis of transfer RNA. Proc. Natl. Acad. Sci. USA 70:2091-2095. 49. Wang, J.C. and Kaiser, A.D. (1973). Evidence that the cohesive ends of mature DNA are generated by the gene A product. Nature New Biology 241:16-17. 50. Hendrix, R. and Casjens, S. (1974). Protein cleavage in bacteriophage tail assembly. Virology 61:156-159. 51. Syvanen, M. (1974). In vitro genetic recombination of bacteriophage . Proc. Natl. Acad. Sci. USA 71:2496-2499. 52. Syvanen, M. (1974). Recombination of phage DNA In vitro. In: Mechanisms in Recombination (ed. R.F. Grell), Plenum Publishing Corporation, New York, pp. 79-88. 53. Hendrix, R. and Casjens, S. (1974). Protein fusion: A novel reaction in bacteriophage head assembly. Proc. Natl. Acad. Sci. USA 71:1451-1455. 54. Berg, D.E. (1974). Genetic evidence for two types of gene arrangements in dv plasmid mutants. J. Mol. Biol. 86:59-68. 55. Casjens, S.R. and Hendrix, R.W. (1974). Locations and amounts of the major structural proteins in bacteriophage lambda. J. Mol. Biol. 88:535-545. 56. Hendrix, R.W. and Casjens, S.R. (1974). Protein fusion during the assembly of phage lambda heads. J. Supramol. Struc. 2:329-336. 57. Casjens, S.R. (1974). Bacteriophage lambda FII gene protein: Role in head assembly. J. Mol. Biol. 90:1-23. 58. Schedl, P., Primakoff, P., and Roberts, J. (1974). Processing of E. coli tRNA precursors. Brookhaven Symposia in Biology No. 26, pp. 53-76. 59. Kaiser, A.D., Syvanen, M. and Masuda, T. (1974). Processing and assembly of the head of bacteriophage lambda. J. Supramol. Struc. 2:318-328. 60. Kaiser, D. and Dworkin, M. (1975). Gene transfer to a myxobacterium by Escherichia coli phage P1. Science 187:653-654. 61. Syvanen, M. (1975). Processing of bacteriophage lambda DNA during its assembly into heads. J. Mol. Biol. 91:165-174. 62. Kaiser, A.D., Syvanen, M. and Masuda, T. (1975). DNA packaging steps in bacteriophage lambda head assembly. J. Mol. Biol. 91:175-186. 63. Reichardt, L.F. (1975). Control of bacteriophage lambda repressor synthesis after phage infection: The role of the N, cII, cIII and cro Products. J. Mol. Biol. 93:267-288. 64. Reichardt, L.F. (1975). Control of bacteriophage lambda repressor synthesis: Regulation of the maintenance pathway by the cro and cI Products. J. Mol. Biol. 93:289-309. 4 A. Dale Kaiser 65. Hodgkin, J. and Kaiser, D. (1977). Cell-to-cell stimulation of movement in nonmotile mutants of Myxococcus. Proc. Natl. Acad. Sci. USA 74:2938-2942. 66. Bretscher, A.P. and Kaiser, D. (1978). Nutrition of Myxococcus xanthus, a fruiting Myxobacterium. J. Bacteriol. 133:763-768. 67. Martin, S., Sodergren, E., Masuda, T. and Kaiser, D. (1978). Systematic isolation of transducing phages for Myxococcus xanthus. Virology 88:44-53. 68. Kaiser, D. (1978). Genetics of cell interactions in myxobacteria. Birth defects: Original Article Series, Vol. Xiv, Number 2, pp. 391-399. 69. Hagen, D.C., Bretscher, A.P. and Kaiser, D. (1978). Synergism between morphogenetic mutants of Myxococcus xanthus. Dev. Biol. 64:284-296. 70. Hodgkin, J. and Kaiser, D. (1979). Genetics of gliding motility in M. xanthus (Myxobacterales): Genes controlling movement of single cells. Mol. Gen. Genet. 171:167-176. 71. Hodgkin, J. and Kaiser, D. (1979). Genetics of gliding motility in M. xanthus (Myxobacterales): Two gene systems control movement. Mol. Gen. Genet. 171:177-191. 72. Kaiser, D. (1979). Social gliding is correlated with the presence of pili in Myxococcus xanthus. Proc. Natl. Acad. Sci. USA 76:5952-5956. 73. Kaiser, D., Manoil, C. and Dworkin, M. (1979). Myxobacteria: Cell interactions, genetics, and development. Ann. Rev. Microbiol. 33:595-639. 74. Manoil, C. and Kaiser, D. (1980). Accumulation of guanosine tetraphosphate and guanosine pentaphosphate in Myxococcus xanthus during starvation and myxospore formation. J. Bacteriol. 141:297-304. 75. Manoil, C. and Kaiser, D. (1980). Guanosine pentaphosphate and guanosine tetraphosphate accumulation and induction of fruiting body development. J. Bacteriol. 141:305-315. 76. Manoil, C. and Kaiser, D. (1980). Purine-containing compounds, including cyclic adenosine 3',5'monophosphate, induce fruiting of Myxococcus xanthus by nutritional imbalance. J. Bacteriol. 141:374–377. 77. Kuner, J. and Kaiser, D. (1981). Introduction of transposon Tn5 into Myxococcus for analysis of developmental and other non-selectable mutants. Proc. Natl. Acad. Sci. USA 78:425-429. 78. Kuner, J.M., Avery, L., Berg, D.E. and Kaiser, A.D. (1981). Uses of transposon Tn5 in the genetic analysis of Myxococcus xanthus. In: Microbiology 1981 (ed. D. Schlessinger), ASM Publications, pp. 128-132. 79. Kuner, J. and Kaiser, D. (1982). Fruiting body morphogenesis in submerged cultures of Myxococcus xanthus. J. Bacteriol. 151:458-461. 80. Shimkets, L. and Kaiser, D. (1982). Induction of coordinated movement of Myxococcus xanthus cells. J. Bacteriol. 152:451-461. 81. Shimkets, L. and Kaiser, D. (19820. Murein components rescue developmental sporulation of Myxococcus xanthus. J. Bacteriol. 152:462-470. 82. Shimkets, L. and Kaiser, D. (1982). Developmental cell interactions in Myxococcus xanthus and the spoC locus. Proc. Natl. Acad. Sci. USA 80:1406-1410. 5 A. Dale Kaiser 83. LaRossa, R., Kuner, J., Hagen, D., Manoil, C. and Kaiser, D. (1983). Developmental cell interactions in Myxococcus analysis of mutants. J. Bacteriol. 153:1394-1404. 84. Sodergren, E. and Kaiser, D. (1983). Insertions of Tn5 near genes that govern stimulatable cell motility in Myxococcus. J. Mol. Biol. 167:295-310. 85. Sodergren, E., Cheng, Y., Avery, L. and Kaiser, D. (1983). Recombination in the vicinity of insertions of transposon Tn5 in Myxococcus xanthus. Genetics 105:281-291. 86. Kaiser, D. and Crosby, C. (1983). Cell movement and its coordination in swarms of Myxococcus xanthus. Cell Motility 3:227-245. 87. Avery, L and Kaiser, D. (1983). In situ transposon replacement and isolation of a spontaneous tandem genetic duplication. Mol. Gen. Genet. 191:99-109. 88. Avery, L and Kaiser, D. (1983). Construction of tandem genetic duplications with defined endpoints in Myxococcus xanthus. Mol. Gen. Genet. 191:110-117. 89. Kaiser, D. (1984). Genetics of Myxobacteria. In: Myxobacteria: Development and Cell Interactions, (ed. E. Rosenberg), Springer, New York, pp. 163-184. 90. Kroos, L. and Kaiser, D. (1984). Construction of Tn5 lac, a transposon that fuses lacZ expression to exogenous promoters, and its introduction into Myxococcus xanthus. Proc. Natl. Acad. Sci. USA 81:5816-5820. 91. Kaiser, D. (1984). Regulation of multicellular development in myxobacteria. In Microbial Development (Losick and Shapiro, eds.), Cold Spring Harbor, New York, pp. 197-218. 92. Dworkin, M. and Kaiser, D. (1985). Cell interactions in myxobacterial growth and development. Science 230:18-24. 93. Kaiser, D., Kroos, L. and Kuspa, A. (1985). Cell interactions govern the temporal pattern of Myxococcus development. Cold Spring Harbor on Quant. Biol. 50:823-830. 94. Kroos, L., Kuspa, A. and Kaiser, D. (1986). A global analysis of developmentally regulated genes in Myxococcus xanthus. Dev. Biol. 117:252-266. 95. Kuspa, A, Kroos, L. and Kaiser, D. (1986). Intercellular signaling is required for developmental gene expression in Myxococcus xanthus. Dev. Biol. 117:267-276. 96. Kaiser, D. (1986). Control of multicellular development: Dictyostelium and Myxococcus. Ann. Rev. Genet. 20:539-566. 97. Stephens, K. and Kaiser, D. (1987). Genetics of gliding motility in Myxococcus xanthus: Molecular cloning of the mgl locus. Mol. Gen. Genet. 207:256-266. 98. Kroos, L. and Kaiser, D. (1987). Expression of many developmentally regulated genes in Myxococcus depends on a sequence of cell interactions. Genes and Devel. 1:840-854. 99. Kroos, L., Hartzell, P., Stephens, K. and Kaiser, D. (1988). A link between cell movement and gene expression argues that motility is required for cell-cell signaling during fruiting body development. Genes and Devel. 2:1677-1685. 100. Stephens, K., Hartzell, P. and Kaiser, D. (1989). Gliding motility in Myxococcus xanthus: the mgl locus, its RNA and predicted protein products. J. Bacteriol. 171:819-830. 101. Kaiser, D. 1989). Multicellular development in myxobacteria. In Genetics of bacterial diversity, (D.A. Hopwood and K.F. Chater, eds.), Harcourt Brace, London, pp. 243-263. 6 A. Dale Kaiser 102. Kuspa, A and Kaiser, D. (1989). Genes required for developmental signalling in Myxococcus xanthus: three asg loci. J. Bacteriol. 171:2762-2772. 103. Cheng, Y. and Kaiser, D. (1989). dsg, a gene required for a cell-cell interaction early in Myxococcus development. J. Bacteriol. 171:3719-3726. 104. Cheng, Y. and Kaiser, D. (1989). dsg, a gene required for Myxococcus xanthus development is necessary for cell viability. J. Bacteriol. 171:3727-3731. 105. Mayo, K. and Kaiser, D. (1989). asgB, a gene required for developmental signaling, aggregation, and sporulation of Myxococcus xanthus. Mol. Gen. Genet. 218:409-418. 106. Kuspa, A, Vollrath, D., Cheng, Y. and Kaiser, D. (1989). Physical mapping of the Myxococcus xanthus genome by random cloning in yeast artificial chromosomes. Proc. Natl. Acad. Sci. USA 86:8917-8921. 107. Kroos, L., Kuspa, A. and Kaiser, D. (1990). Defects in fruiting body development caused by Tn5 lac insertions in Myxococcus xanthus. J. Bacteriol. 172:484-487. 108. Kim, S.K. and Kaiser, D. (1990). C-factor: A cell-cell signaling protein required for fruiting body morphogenesis of M. xanthus. Cell 61:19-26. 109. Kim, S.K. and Kaiser, D. (1990). Cell motility is required for the transmission of C-factor, an intercellular signal that coordinates fruiting body morphogenesis of Myxococcus xanthus. Genes and Devel. 4:896-905. 110. Kim, S.K. and Kaiser, D. (1990). Purification and properties of Myxococcus xanthus C-factor, an intercellular signaling protein. Proc. Natl. Acad. Sci. USA 87:3635-3639. 111. Kim, S.K. and Kaiser, D. (1990). Cell alignment required in differentiation of Myxococcus xanthus. Science 249:926-928. 112. Kaiser, D. (1991). Genetic systems in myxobacteria. Methods in Enzymology 204:357-372. 113. Kaplan, H.B., Kuspa, A. and Kaiser, D. (1991). Suppressors that permit A signal-independent developmental gene expression in Myxococcus xanthus. J. Bacteriol. 173:1460-1470. 114. Kim, S.K. and Kaiser, D. (1991). C-factor has distinct aggregation and sporulation thresholds during Myxococcus development. J. Bacteriol. 173:1722-1728. 115. Kimsey, H.H. and Kaiser, D. (1991). Targeted disruption of the Myxococcus xanthus orotidine 5'monophosphate decarboxylase gene: effects on growth and fruiting-body development. J. Bacteriol. 173:6790-6797. 116. Hartzell, P. and Kaiser, D. (1991). Function of MglA, a 22-kilodalton protein essential for gliding in Myxococcus xanthus. J. Bacteriol. 173:7615-7624. 117. Hartzell, P. and Kaiser, D. (1991). Upstream gene of the mgl operon controls the level of MglA protein in Myxococcus xanthus. J. Bacteriol. 173:7625-7635. 118. Kim, S.K. (1991). Intercellular signaling in Myxococcus development: the role of C factor. Trends in Genetics 7:361-365. 119. Kimsey, H., Kaiser, D. (1992). The Orotidine 5'-Monophosphate Decarboxylase Gene of Myxococcus xanthus. J. Biol. Chem. 267:819-824. 120. Plamann, L., Kuspa, A. and Kaiser, D. (1992). Proteins that rescue A-signal-defective mutants of Myxococcus xanthus. J. Bacteriol. 174:3311-3318. 7 A. Dale Kaiser 121. Kuspa, A., Plamann, L. and Kaiser, D. (1992). Identification of heat-stable A-factor from Myxococcus xanthus. J. Bacteriol. 174:3319-3326. 122. Kuspa, A. Plamann, L. and Kaiser, D. (1992). A-signalling and the cell density requirement for Myxococcus xanthus development. J. Bacteriol. 174:7360-7369. 123. Kim, S.K., Kaiser, D. and Kuspa, A. (1992). Control of cell density and pattern by intercellular signaling in Myxococcus development. Ann. Rev. Microbiol. 46:117-139. 124. Sager, B. and Kaiser, D. (1993). Two cell-density domains within the Myxococcus xanthus fruiting body. Proc. Natl. Acad. Sci. USA 90:3690-3694. 125. Kaiser, D. and Losick, R. (1993). How and why bacteria talk to each other. Cell 73:873-885. 126. Sager, B. and Kaiser, D. (1993). Spatial restriction of cellular differentiation. Genes and Devel. 7:1645-1653. 127. Kaiser, D. (1993). Roland Thaxter’s legacy and the origins of multicellular development. Genetics 135:249-254. 128. Russo-Marie, F., Roederer, M., Sager, B., Herzenberg, L.A. and Kaiser, D. (1993). -galactosidase activity in single differentiating bacterial cells. Proc. Natl. Acad. Sci. USA 90:8194-8198. 129. Thöny-Meyer, L. and Kaiser, D. (1993). devRS, an autoregulated and essential genetic locus for fruiting body development in Myxococcus xanthus. J. Bacteriol. 175:7450-7462. 130. Cheng, Y.L., Kalman, L.V. and Kaiser, D. (1993). The dsg gene of Myxococcus xanthus. J. Bacteriol. 176:1427-1433. 131. Kalman, L.V., Cheng, Y.L. and Kaiser, D. (1994). The Myxococcus xanthus dsg gene product performs functions of translation initiation factor IF3 in vivo. J. Bacteriol. 176:1434-1442. 132. He, Q., Chen, H., Kuspa, A., Cheng, Y., Kaiser, D. and Shimkets, L. (1994). A physical map of the Myxococcus xanthus chromosome. Proc. Natl. Acad. Sci. USA 91:9584-9587. 133. Sager, B. and Kaiser, D. (1994). Intercellular C-signalling and the traveling waves of Myxococcus. Genes and Devel. 8:2793-2804. 134. Singer, M. and Kaiser, D. (1995). Ectopic production of guanosine penta-and tetraphosphate can initiate early developmental gene expression in Myxococcus xanthus. Genes and Devel. 9:1633-1644. 135. Keseler, I. and Kaiser, D. (1995). An early A-signal-dependent gene in Myxococcus xanthus has a 54like promoter. J. Bacteriol. 177:4638-4644. 136. Spormann, A.M. and Kaiser, D. (1995). Gliding movements in Myxococcus xanthus. J. Bacteriol. 177:5846-5852. 137. Wu, S. and Kaiser, D. (1995). Genetic and functional evidence that Type IV pili are required for social gliding motility in Myxococcus xanthus. Mol. Microbiol. 18:547-558. 138. Søgaard-Andersen, L. and Kaiser, D. (1996). C-factor, a cell surface-associated intercellular signaling protein, stimulates the cytoplasmic Frz signal transduction system in Myxococcus xanthus. Proc. Natl. Acad. Sci. USA 93:2675-2679. 139. Søgaard-Andersen, L., Slack, F.J., Kimsey, H. and Kaiser, D. (1996). Intercellular C-signaling in Myxococcus xanthus involves a branched signal transduction pathway. Genes and Devel. 10:740-754. 140. Kaiser, D. (1996). Bacteria also vote. Science 272:1598-1599. 8 A. Dale Kaiser 141. Wu, S.S. and Kaiser, D. (1996). Markerless deletions of pil genes in Myxococcus xanthus generated by counterselection with the Bacillus subtilis sacB gene. J. Bacteriol. 178:5817-5821. 142. Wu, S.S. and Kaiser, D. (1997). The Myxococcus xanthus pilT locus is required for social gliding motility although pili are still produced. Mol. Microbiol. 23:109-121. 143. Keseler, I.M. and Kaiser, D. (1997). 54, a vital protein for Myxococcus xanthus. Proc. Natl. Acad. Sci. USA 94:1979-1984. 144. Rodriguez-Soto, J.P. and Kaiser, D. (1997). The tgl gene: Social motility and stimulation in Myxococcus xanthus. J. Bacteriol. 179:4361-4371. 145. Rodriguez-Soto, J.P. and Kaiser, D. (1997). Identification and localization of the Tgl protein, which is required for Myxococcus xanthus social motility. J. Bacteriol. 179:4372-4381. 146. Wu, S.S. and Kaiser, D. (1997). Regulation of expression of the pilA gene in Myxococcus xanthus. J. Bacteriol. 179:7748-7758. 147. Wu, S.S., Wu, J., Cheng, Y.L. and Kaiser, D. (1998). The pilH gene encodes an ABC transporter homologue required for type IV pilous biogenesis and social gliding motility in Myxococcus xanthus. Mol. Microbiol. 29:1249-1261. 148. Wall, D., Wu, S.S. and Kaiser, D. (1998). Contact stimulation of Tgl and type IV pili in Myxococcus xanthus. J. Bacteriol. 180:759-761. 149. Wall, D. and Kaiser, D. (1998). Alignment enhances the cell-to-cell transfer of pilus phenotype. Proc. Natl. Acad. Sci. USA 95:3054-3058. 150. Gorski, L. and Kaiser, D. (1998). Targeted mutagenesis of sigma-54 activator proteins in Myxococcus xanthus. J. Bacteriol. 180:5896-5905. 151. Harris, B.Z., Kaiser, D. and Singer, M. (1998). The guanosine nucleotide (p)ppGpp initiates development and A-factor production in Myxococcus xanthus. Genes and Devel. 12:1022-1035. 152. Wall, D., Kolenbrander, P.E. and Kaiser, D. (1999). The Myxococcus xanthus pilQ (sglA) gene encodes a secretin homolog required for Type IV pilus biogenesis, social motility, and development. J. Bacteriol. 181:24-33. 153. Spormann, A.M. and Kaiser, D. (1999). Gliding mutants of Myxococcus xanthus with high reversal frequencies and small displacements. J. Bacteriol. 181:2593-2601. 154. Wall, D. and Kaiser, D. (1999). Type IV pili and cell motility. Mol. Microbiol. 32:1-10. 155. Kaiser, D. (1999). Cell fate and organogenesis in bacteria. Trends Genet. 15:273-277. 156. Fontes, M. and Kaiser, D. (1999). Myxococcus cells respond to elastic forces in their substrate. Proc. Natl. Acad. Sci. USA 96:8052-8057. 157. Gorski, L., Gronewold, T. and Kaiser, D. (2000). 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