The Amino-Acid Sequence of the Major Parvalbumin from Thornback-Ray Muscle

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Abstract
The primary structure of the major parvalbumin (pI= 4.45) from the cartilagenous fish Raja clavata has been determined. The amino acid sequence was deduced by the analysis of peptides derived from tryptic digestion of the oxidized protein. These peptides were aligned by comparison with (a) overlapping peptides produced by limited tryptic and chymotryptic digestion, and (b) by comparison with the known structures of other fish paryalbumins. The molecular evolution of thornback ray parvalbumin is briefly discussed.