Abstract
The technique of circular paper chromatography was used in the analysis of free amino-acids and amino-acid constituents of proteins and peptides in Enteromorpha prolifera f. capillaris and Ulva lactuca var. rigida collected from Bombay at fortnightly intervals. The amino-acids present in the proteins at different stages of algal grwoth remained the same; but quantitative variations in composition were usually observed, and these were independent of the age of the plant. Significant quantitative and qualitative variations were observed in the amino-acids of the peptides and in the free state, but variations were usually independent of the age of the plant. However, in Enteromorpha prolifera f. capillaris, leucine(s), proline, and valine in the peptides, and serine in the free state were found to increase with the age of the plant. Of the amino-acids recorded in the proteins, homocystine was not found in the peptide hydrolysates or among the free amino-acids. Tryptophan was absent from the peptides. Cysteric acid was found in the peptides and in the free state, and asparagine in the free state only.
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