TABLE 3.

Transformation frequencies of E. faecalis JH2-2/pAM330Δ9 by IR-1 mutant plasmids

PlasmidTransformation frequencya
pAM88A*1.8 × 10−5
pAM88A*-IR3+45.2 × 10−5
pAM88A*-IR1+21.5 × 10−7
pAM88A*-IR1+2+3+43.5 × 10−8
pAM88A*-5×IR2.0 × 10−8
pAM4013.0 × 10−6
  • a That is, the number of transformants per total number of competent cells per microgram of DNA.