FIG. 4.

Recipient activities of strain A136(pAB123) carrying plasmids expressing various subsets of the VirB proteins. The adjusted mean numbers of transconjugants per output recipient (from the Tukey-Kramer analysis [see Materials and Methods]) are indicated along with 2 standard errors. An asterisk indicates that a value is significantly different than the value obtained for A136(pAB123) at a 95% confidence level; a number sign indicates that a value is not significantly different from the value obtained for A136 (see Materials and Methods for details concerning statistics).