TABLE 1.

Transformation of N. gonorrhoeae expressing different Opa proteins

Opa phenotype	Oa	Transformation frequency ([no. of transformants/μg of DNA/CFU] × 103)					% Errord
		Overallb	Ma	Subpopulationc		Pa
				Opa+	Opa−
Opa−	NAe	0.77	NA	NA	NA	NA	NA
OpaA	0.88	2.83	0.18	7.45	1.88	0.47	2
OpaF	0.93	3.35	0.16	7.25	2.61	0.35	<1
OpaH	0.54	1.86	0.08	2.73	1.73	0.13	3
OpaI	0.79	2.26	0.16	3.65	1.88	0.27	<1

^aO, M, and P values refer to the fraction of Opa⁺ organisms in the initial, final, and transformant populations, respectively. 

^bOverall frequency represents the mean value (n = 5) determined without phenotypic evaluation of the culture. 

^cSubpopulation frequencies were obtained for each Opa⁺ and Opa⁻ subpopulation within a culture as described in Materials and Methods. 

^d% Error was calculated as indicated in Materials and Methods. 

^eNA, not applicable.