TABLE 2

Bacterial strains used in this studya

Strain identifierLTEE populationGeneration
REL606Ancestral strain0
REL1158AAra+12,000
REL1159AAra+22,000
REL1160AAra+32,000
REL1161AAra+42,000
REL1162AAra+52,000
REL1163AAra+62,000
REL1164AAra–12,000
REL1165AAra–22,000
REL1166AAra–32,000
REL1167AAra–42,000
REL1168AAra–52,000
REL1169AAra–62,000
REL11392Ara+150,000
REL11342Ara+250,000
REL11345bAra+350,000
REL11348Ara+450,000
REL11367Ara+550,000
REL11370bAra+650,000
REL11330bAra–150,000
REL11335bAra–250,000
REL11364bAra–350,000
REL11336bAra–450,000
REL11339Ara–550,000
REL11389Ara–650,000
  • a All strains derive from E. coli B REL606 or REL607, an Ara+ mutant of REL606 (17, 19).

  • b These clones are from populations that were hypermutable for much of the time during the LTEE.