Renaturation promoted by HsRad51 and RecA. Renaturation reactions were carried out as described in the text. The fraction of labeled oligonucleotide in double-stranded form was determined by gel electrophoresis. ▵, No protein; •, HsRad51 and ATP; ○, HsRad51 and ATP[γS]; ▪, RecA and ATP; □, RecA and ATP[γS].