[Amino acid composition of polynucleotide-peptide complexes isolated from algae]

The amino acid composition of the peptide moiety of sulphur containing polynucleotide-peptide complexes (S-PNPC) was studied with four species of green algae and two species of blue-green algae. S-PNPC contained almost all amino acids which were usually encountered in acid hydrolysates of proteins, and also unidentified ninhydrin-positive compounds. The amino acid composition of the peptide moiety of S-PNPC was rather similar in the case of different algae, and was characterized by the prevailence of acid amino acids.