The unit-peptide, cadystin, of cadmium-binding peptides occurring in a fission yeast, S. pombe was determined to have structure H-γ-Glu-Cys-γ-Glu-Cys-Cys-γ-glu-Gly-OH; all Glu and two cys being L-form, whereas one of the Cys's D-form.
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