Legend for Supplementary Figure S1 Conserved Su(H), proneural, bHLH repressor and MatInspector identified transcription factor binding site sequences upstream of the E(spl) genes. Multispecies Conserved Sequence (MCS) were identified in EvoPrint outputs representing nine Drosophila species (D. melanogaster, D. simulans, D. yakuba, D. erecta, D. ananasse, D. pseuodoobscura, D. virilis, D. mojavensis and D. grimshawi) and scanned for consensus sites. Capital letters represent sequences conserved in all nine species. Specific sequences for sites are underlined and are presented in the context of the MCS where they are located. MCS numbers are based on the distance upstream from the putative transcription start sites (NELLESEN et al. 1999). Sites containing a modification from the consensus sequence are denoted with an asterisk. Su(H) paired sites are designated SPS. Sites are color-coded: Su(H) sites are orange, proneural sites are red, bHLH repressor sites are blue and MatInspector identified transcription factor binding sites are all in green. Supplementary Figure S1 m1 Paired Class B Ebox Su(H)1 -1198 GCGGCCTTCGcGTGCGTGACgaGCATtCGCTTAGCGGTCATTGATTGGCC-1147 -1198 GCGGCCTTCGcGTGCGTGACgaGCATtCGCTTAGCGGTCATTGATTGGCC -1147 -1115 AGGGCGCCGtcAGCAACAAGTGTGT*GAACACcATTAAaCGGTGaTTAG-1071 1 GTGT*GAA site is a modified consensus site (* indicates T versus G), however Nellesen et al determined that Su(H) binds the site with high affinity. This site is categorized as a partial consensus high affinity site (Hpc) in Table 2 of the manuscript. This site is present in all species examined except D. grimshawi. m2 Chorion factor Su(H)1 high affinity Broad Complex Z2 Proneural Ac/Sc Su(H) high affinity Proneural Atonal E74A Snail Su(H)1 high affinity Doublesex Dorsal Su(H) low affinity N box Su(H)2 low affinity Zeste CF2-II Crocodile -1326 AGGTCAcGGCCTCATTA -1309 -1221 GGAGCGTGT*GAa -1209 -1138 GAGCCTGATTATAAATGACAACAAACAGGCcAACAAGTAGCAAtAACAGCTGCTC -1083 -1138 GAGCCTGATTATAAATGACAACAAACAGGCcAACAAGTAGCAAtAACAGCTGCTC -1083 -1025 AACAACAAtAATagtgccccgaaAAAAgCCGAAAAcCCAAGTGAAATTCTTATAAGCCCTTTCCCACACTCG -953 -833 AAgGGAACAGGTGCt -818 -874 CCAGGACGGAAAT -861 -833 AAgGGAACAGGTGCt -818 -693 GGGTACCGTGT*GAATGTgAAAACAAAGTCAGTCGTGCATAAATGACG -676 -693 GGGTACCGTGTGAATGTgAAAACAAAGTCAGTCGTGCATAAATGACG -676 -693 GGGTACCGTGTGAATGTgAAAACAAAGTCAGTCGTGCATAAATGACG -676 -351 CATCTACCTGCAGCCaAAACTCATCAAgCGGCCCTTGTCGATTGTACGTGCATGGGAAAAGTACACACA -282 -270 GCTTGTgGATTCCTGTTGGAATTTATTTGGGAAATACGCGCACATAAAA -221 -144 g*TGAGAGTGCACTCAAATTTCGTACgGTGCT -113 -144 gTGAGAGTGCACTCAAATTTCGTACgGTGCT -113 -38 GcCTCATATATAAATATGAGCG -16 -38 GcCTCATATATAAATATGAGCG -16 GTGT*GAA site is a modified consensus site (* indicates T versus G), however NELLESEN et al. (1999) determined that Su(H) binds the site with high affinity. This site is categorized as a partial consensus high affinity site (Hpc) in Table 2 of the manuscript. 1 2 The low affinity consensus site is completely conserved in D. yakuba, D. erecta, D. anannase, D. pseudoobscura, and D. grimshawi, but is modified to a partial consensus site (G to T designated with an asterisk) in D. mojavensis and D. virilis. HLHm3 Hunchback Caudal Paired Ftz Adf-1 SPS -1783 AAAAAacAGGCAACATTTTaTACAC -1758 -1783 AAAAAacAGGCAACATTTTaTACAC -1758 -1547 AATCGATAcgCTtcAACGAAA -1526 -1547 AATCGATAcgCTtcAACGAAA -1526 -1138 CAGCAAcAACATTTCAGCAATCCATCGGATCGCATCACAATCCAGCCATCCGTCCAACG TGTGGGAAACACACGACAAATCTGTTTCCCACGGTCTCGTAAAGTAGGCACaccgCACACAC -1017 -1138 CAGCAAcAACATTTCAGCAATCCATCGGATCGCATCACAATCCAGCCATCCGTCCAACG TGTGGGAAACACACGACAAATCTGTTTCCCACGGTCTCGTAAAGTAGGCACaccgCACACAC -1017 m4 Snail Ftz Croc Paired Krueppel Ftz Class C Ebox-Hairy Ftz Ftz Ftz Deformed Dead ringer Ftz Snail Su(H) low affinity Class B E box BRCZ1 Caudal Snail Escargot SPS Proneural Ac/Sc Su(H) high affinity -1235 atCTGtTAACGCCAGCCTACAacTTCTCACC -1206 -1196 CTTAATTTGTC -1185 -1168 AAATATTTAT -1157 -1141 CAATCCATTAAGtAC -1126 -1141 CAATCCATTAAGtAC -1126 -1141 CAATCCATTAAGtAC -1126 -1032 CGCCTCACGCGCCATCA -1015 -895 CTGCTAATTGT -884 -868 AAATTAAAAGCAACTCCTTC -848 -779 AaTTTgATAAATTTcAAATTACAGCGCATTAAat -747 -636 CATTAATTGTT -625 -636 CATTAATTGTT -625 -636 CATTAATTGTT -625 -574 TGCACACGTGTTC -561 -571 GTTCgAGCGTTGAAAATTGAAAATaTTCTCCCACGT -532 -524 TGCACACGTGTTC -511 -475 ATAAAAACCAAAAGTGATC -456 -475 ATAAAAACCAAAAGTGATC -456 -334 ttcaaCAGGTGcgAG -319 check -334 ttcaaCAGGTGcgAG -319 check -340 ACTGTGGGAACTGgTaGAAAGTCTCGtTTCTCACGATCCTG -295 -184 AAACACACCTGCCGTTTTT -161 -114 CACGTATCCTTGTAgTTTCCCACACTCG -82 HLHm5 Ftz Su(H) low affinity c-rel Deformed Ftz Proneural-Ac/Sc Class C Ebox/Hairy SPS Paired 1 -1413 TTCAATTAGCcCATGTCGTAAAGTACAAATAACTATTGCGtACA -1369 -1258 CGACAAGAGtGaAAAACTAAAGTAAAGCAG -1228 -1258 CGACAAGAGtGaAAAACTAAAGTAAAGCAG -1228 -1258 CGACAAGAGtGaAAAACTAAAGTAAAGCAGgcAGtAATCAGT -1216 -946 TGTAATCGtAACCATATAAGCGtCTTAAATGGCAGGTGTGCACATCGCGTGGGAAACACACGACG -881 -946 TGTAATCGtAACCATATAAGCGtCTTAAATGGCAGGTGTGCACATCGCGTGGGAAACACACGACG -881 -946 TGTAATCGtAACCATATAAGCGtCTTAAATGGCAGGTGTGCACATCGCGTGGGAAACACACGACG -881 -946 TGTAATCGtAACCATATAAGCGtCTTAAATGGCAGGTGTGCACATCGCGTGGGAA ACACACGACGcgtCtcGAGCgGTTCTCACGATATGAAAATCGAGCAA -844 -875 GAGCgGtTCTCACGATATGAAAATCGAGCAA -844 The consensus site is conserved in all species examined except for D. ananassae, which contains a partial consensus with two modifications. m6 Ftz -468 GGGCTGTGGCCTAAATTGCAAaCAGCTGCCACTCGAACCGTGGGATActTTTtCCCCTA -409 Zeste -468 GGGCTGTGGCCTAAATTGCAAaCAGCTGCCACTCGAACCGTGGGATActTTTtCCCCTA -409 Proneural Ac/Sc -468 GGGCTGTGGCCTAAATTGCAAaCAGCTGCCACTCGAACCGTGGGATActTTTtCCCCTA -409 Dorsal -468 GGGCTGTGGCCTAAATTGCAAaCAGCTGCCACTCGAACCGTGGGATActTTTtCCCCTA -409 Su(H) low affinity -354 CGAACCTTATCCATGGGAACCACAACTGCTCaACGCTCTCAATATTTAtT -304 Trithorax-like (GAGA) Croc Class B Ebox Snail -354 CGAACCTTATCCATGGGAACCACAACTGCTCaACGCTCTCAATATTTAtT -304 -354 CGAACCTTATCCATGGGAACCACAACTGCTCaACGCTCTCAATATTTAtT -304 -217 GATTATCCTGCACGTGTTGAGCTTGCT -190 -217 GATTATCCTGCACGTGTTGAGCTTGCT -190 The majority of m6 bHLH repressor sites are found outside of MCSs, consequently the sites reported here do not represent all of the consensus sites found in multiple species (see Table 4 for the total number of sites). 1 The conserved Ac/Sc proneural site is a partial consensus site in D. melanogaster, D. simulans, D. yakuba, D. erecta, D. ananassae, D. pseudoobscura, and D. persimillis, however it is a consensus site in D. virilis, D. mojavensis and D. grimshawi. HLHm7 Dorsal N box SPS Class B Ebox -709 CGATTATAACTTATAACACCAACgAGCGAGAAAATCTTGTGGGAAACTTGAGGGCA AAGTGTTTCCCACGATTCGAA -631 -709 CGATTATAACTTATAACACCAACgAGCGAGAAAATCTTGTGGGAAACTTGAGGGCA AAGTGTTTCCCACGATTCGAA -631 -709 CGATTATAACTTATAACACCAACgAGCGAGAAAATCTTGTGGGAAACTTGAGGGCA AAGTGTTTCCCACGATTCGAA -631 -43 GGCACGTGCAGCTATAAAAGCaGcgGTAACcGGAGA -7 All species examined contain at least one consensus Ac/Sc proneural site, however the site(s) are not present in MCSs and are thus not represented here (See Table 3 for the total number of sites). HLHm8 Ftz Dorsal Dorsal SPS -394 CGACAGGATGAGGCAgTGAAGTATGCATTAAGGATAATAACACCGG -348 -257 AGCGAAGCATGTGGCCAAAAgGgAAAACAAACGAGAAAAAATTGTGTGAGAAACTTACTTTCAGcTC -190 -257 AGCGAAGCATGTGGCCAAAAgGgAAAACAAACGAGAAAAAATTGTGTGAGAAACTTACTTTCAGcTC -190 -324 AGCGAAGCATGTGGCCAAAAgGgAAAACAAACGAGAAAAAATTGTGTGAGAA ACTTACTTTCAGcTCGGTTCCCACGCCACGAGCCACAAGGATTGT-160 N box -324 AGCGAAGCATGTGGCCAAAAgGgAAAACAAACGAGAAAAAATTGTGTGAGAA ACTTACTTTCAGcTCGGTTCCCACGCCACGAGCCACAAGGATTGT-160 -324 AGCGAAGCATGTGGCCAAAAgGgAAAACAAACGAGAAAAAATTGTGTGAGAA ACTTACTTTCAGcTCGGTTCCCACGCCACGAGCCACAAGGATTGT-160 -144 TTGCAGCTGTTCC -131 N box Proneural Ac/Sc m Deformed Deformed PAX6 P3 Su(H) high affinity Su(H) high affinity Su(H) high affinity Proneural- Ac/Sc Dorsal - 898 AATTAATTAAAATATCTatA -878 - 898 AATTAATTAAAATATCTatA -878 - 898 AATTAATTAAAATATCTatA -878 -759 TGTGGGAAAGTT -747 -632 TgTGGgAATGCGTGGGAAT -613 -482 CGTGAGAAATTTTACcAAGGAACACCTGCC -452 -482 CGTGAGAAATTTTACcAAGGAACACCTGCC -452 -348 CgAAAAATTGTTTCCCACACT -327 Su(H) high affinity -348 CgAAAAATTGTTTCCCACACT -327 HLHm Ftz Paired Heat shock factor Paired Paired Paired Su(H) high affinity Adf-1 N box -826 CAATCAAGAATAATCATGTAAACGAAAAGCGTAATGCT -788 -826 CAATCAAGAATAATCATGTAAACGAAAAGCGTAATGCT -788 -826 CAATCAAGAATAATCATGTAAACGAAAAGCGTAATGCT -788 -826 CAATCAAGAATAATCATGTAAACGAAAAGCGTAATGCT -788 -766 CCACGATCCAATCAATGATCCATAAAGCGcTaacAAAAAA -726 -766 CCACGATCCAATCAATGATCCATAAAGCGcTaacAAAAAA -726 -322 CGTCGTGGAAAtcGGCTGCGAAACAGTTTCCCACGGTATAACAATCACA -273 -96 GCAGCAGGCcGCGCACGAGGCAAAAtGaGtgTCcCgCTCGCACTC -61 -96 GCAGCAGGCcGCGCACGAGGCAAAAtGaGtgTCcCgCTCGCACTC -61 HLHm Ftz N box Su(H) high Affinity Proneural Ac/Sc E74A BCZ1 Su(H) low affinity Proneural Ac/Sc SPS Ttk69 Knirps E74A -709 gcATTAAGCgCACTCGaCGCACACGAGCAATGTTCCCACAGGAtCAT -662 -707ATTAAGCgCACTCGaCGCACACGAGCAATGTTCCCACAGGAtCAT -662 -707ATTAAGCgCACTCGaCGCACACGAGCAATGTTCCCACAGGAtCAT -662 -410 CAAATCATAacACAcaAATCTAGAAAcGGCAGCTG -375 -571 AAACAGGAAGT -560 -410 CAAATCATAacACAcaAATCTAGAAAcGGCAGCTG -375 -365 AAATTCCCAT -355 -318 GCAGGTGAGC -308 -301 TGTGAGAAACCgAGtagGAAaGtGtTTCCCACGATcCTgGCAGCGaTCCTGCTCCCT -244 -301 TGTGAGAAACCgAGtagGAAaGtGtTTCCCACGATcCTgGCAGCGaTCCTGCTCCCT -244 -216 ACAATAAGAAatCGccCgAACAATAAG -189 -175 AGCGGAAGG -166 HLHm Proneural Ac/Sc1 N box SPS N box Class B E box N box 1 -1418 GCGCCAAACAAGTGtCA*CAGCTGACC -1392 -1350 ATCCCAATACTTGTGGGAATGtcTccAGTAcACTTTCTCACGATG -1305 -1350 ATCCCAATACTTGTGGGAATGtcTccAGTAcACTTTCTCACGATG -1305 -603 GCACGAG -596 -185 TGCACACGTGCA -173 -159 TTGCCaCAAgCAGAG -149 The partial consensus site for Ac/Sc (A versus G designated with an asterisk) is conserved in all eight species examined.