complex formation of circular , single-stranded phage fd dna with escherichia coli dna binding protein hd or phage fd gene 5 protein keeps infection of e. coli spheroplasts at the level of free phage dna , whereas complexes of this dna with e. coli dna unwinding protein show a strongly reduced efficiency of transfection .
C0012935
single-stranded
C0012854
dna