[Interaction between sodium bisulfite and bacteriophage SD DNA].

The interaction between sodium bisulfite and the cytosine residues within the intraphage DNA of phage SD was studied to elucidate the structure of viral nucleoprotein. Hydrolysis with perchloric acid of bisulfite-modified phage SD results in 18% decrease of cytosine and appearance of products having the properties of cytosyl amino acids (most probably cytosyl lysine). When the modified phage before hydrolysis was subjected to mild destruction in 0.