Table S3. Primers used in this study. Name A10 AM1 B109 L106 L19 L23 L340 L35 L50 L6 L61 L55 L70 L71 L270 L271 L299 T17 W10 W104 W113 W115 W117 W12 W121 W13 W14 W149 W15 W16 W161 W162 W164 W17 W170 W174 W177 W179 W18 W19 W190 W198 W20 Sequence 5'-3' CTTTGTACTGATGATTTATATACTTCGGCATACGT aaaaGTCGACATGATGCTTGAAATATAGTTGTG TGTGCACCGGAACAGATGTATAG ggggACCACTTTGTACAAGAAAGCTGGGTTGCATGATTCAAATTGTTATTTGG aaaGGTACCTTTAAAGTATATATCAGATTGTTTCG CAAAGAGCTCGTCTACAAATTTC aaaGGGCCCTTTAAATACTTTTGTTGCCAATGTC TTTTGTATACAGGTGGTGGCC aaaAGATCTAATAATGTATTTACGCTGGGGC aaaGGTACCAAATTTAATGCTATTTTCCTTCGC GCCGAAGTATATAAATCATCAG TAAATCTAACAACACTCTAA aaaaAAGCTTCAAGAATCCAATGAAGTAGGGG aaaaAAGCTTCTAAATTAGAACATGATACTAACG aaaAAGCTTGTACAGATCTCGAGAGCTCCTAGGCTAGCATGCAAATAT GAGCCAAATAAATATATTC aaaGGTACCAGCTTCTGTAGGTTTTTAGGC aaaGCTAGCAAATTTAATGCTATTTTCCTTCGC GCGATGCTTCATATCGTGCG CAATCAAACATCAGCCAATCGC TATGGTGATAAAGAGCAGATAAG AAATAACCTTTAACTATGGCTCC AGACACAGGTACTATGCCATC CTTTTGTTAAGGAGAGCAAAGC AAAAAATAATGATAATTGACGAGAC AAATTGGGGCATATTCTTGAACC TTATGGTTATTCAATTCTCAGATC ATCAATTTTTGTCCCAATTTTCAG TATCAAGTATTTCCTCATCATCG CAAATTACTGCTATATATTCAGGC TTAAATTTTATTATGAAGCAGGACG AACTTGTGTAATGAGTAAGCCTC TATGCTTATCGCCTTTGTCTCC TTCATCCCTAACACCCCTATC ACAAGAAACTGATTCAAGTGCTG TCTTCAGTTGTAATACTATTGGC TCGGAAGTCACTAGTTCCTTAG TTAATCCATAGTTGGCTGCTATG TGTCACTCCTCTACTGTATTATC TATTCTGAAAAGGTCAATCAAGG CTACTTTAATAATTGAAAAAGATGG AAAACCCCTGCATTTCTTCATTC TGATTCTAGTGAAAATCATCATAG GTCTTTTAAATATCAGAACAGTTAC 1 Use pWJ28 construct pLM477 construct 2537228(a) 2508018(a) 2518543(a) 2513323(a) 2512967(a) 2515382(a) 2518206(a) 2517502(a) 2517804(a) pWJ28 construct pG0400(b) pG0400(b) pLM9 construct pLM9 construct pLM477 construct 2510951(a) IS256(c) 2582417(a) 2431697(a) 2438512(a) 2435115(a) 2514651(a) 2581387(a) 2516985(a) 2516186(a) 2521139(a) 2514570(a) 2513774(a) 2551795(a) 2399121(a) 2469160(a) 2512540(a) 2447577(a) 2358547(a) 2553620(a) 2273662(a) 2511748(a) 2510135(a) 2563690(a) 2487258(a) 2509349(a) W200 TGTTAAAGTAGAAGGATCATCTG 2492561(a) W203 AAGGGCAATCCGAATACCACC 2401456(a) W213 TGTCATATTCAAATCCGTGCTG 2495077(a) W233 CTCTACTCACAAATTGCCAGTC 2295234(a) W35 GCATTAATTGCAACGATAACCG 2494464(a) W69 CTGATTAGGCAACAGTTATCCAG 2584858(a) W9 CCATTAGTTGATTAAATACCGTTG IS256(c) W94 AGAAACAAGTTGGTGAGTATAAC 2387024(a) W591 ATACTCAACCAGTTTATGATTGTTCTCGTCCCCTTTTCTTC pWJ87 construct W592 ACACTTCGTTATAGTAAATCTAACAACACTCTAAAAAATTG pWJ87 construct (a) Oligonucleotide used for primer walking. Numbers indicate the genomic coordinates of S. epidermidis RP62a where the 3’ end nucleotide of the primer anneals. (b) These primers amplify the nickase gene of the conjugative plasmid pG0400 and they were used to sequence spc1 target site. (c) These primers anneal on the transposase gene of the IS256 element and were used to sequence the site of insertion of escapers containing IS256 insertions in the cas genes. 2