Amino Acid Sequence in the Phenylalanyl Chains

In the upper part of Table XII are listed the various peptides identified in this work and the sequences which were deduced from them as 

Cysteic Acid Peptides from Fraction B of Oxidized Insulin (Sanger and Tuppy, 1961a) 

Peptide Amino acids present Strength of amino acid after hydrolysis of Peptide DNP-Peptide structure 

The action of the proteolytic enzymes pepsin, trypsin, and chymo-trypsin on this fraction was next investigated (Sanger and Tuppy, 

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Sanger, F., and Tuppy, H., The amino acid sequence in the phenylalanyl chain of insulin. I. The identification of lower peptides from partial hydrolysates. Biochem. J. 49, 463-481 (1951). 

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