The amino acid sequence of plastocyanin from potato was determined. It consists of a single polypeptide chain of 99 residues, of molecular weight 10332. The sequence was determined by using a Beckman 890c sequencer and by dansyl-Edman analysis of peptides derived from purified CNBr fragments. The sequence shows considerable similarity with that of Chlorella fusca, and also with the C-terminal region of bacterial azurins.
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Ramshaw et al. (1974) studied this question.
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