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. 1999 Aug;67(8):4153–4160. doi: 10.1128/iai.67.8.4153-4160.1999

TABLE 2.

Binding of E. coli strains expressing or not expressing OapA to Chang epithelial cells

E. coli strains and phenotype	No. of bacteria bound^a
E. coli strains and phenotype	CFU/well	% of inoculum
DH5α(pUC4)	1.0 × 10⁶ ± 0.2 × 10⁶	3.9 ± 0.76
DH5α(pE214) OapA⁺	4.65 × 10⁶ ± 0.2 × 10⁶	12.2 ± 0.53^b
DH5α(pE219) OapA⁻	1.23 × 10⁶ ± 0.5 × 10⁶	4.1 ± 1.74
DH5α(pEL1) OapA⁺	5.35 × 10⁶ ± 0.7 × 10⁶	13.5 ± 1.76^b

^a

Mean ± standard deviation of at least three separate experiments done in triplicate.

^b

P < 0.01 by two-tailed t test compared to OapA⁻ strains.