a strand exchange reaction between a single-stranded dna circle and a homologous linear double-stranded dna molecule is catalyzed by a mixture of two t4 bacteriophage proteins , the uvsx protein ( a dna-dependent atpase that resembles the reca protein ) and the gene 32 protein ( a helix-destabilizing protein ) .
C0012935
single-stranded dna
C0012854
double-stranded dna