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The N-terminal amino acid sequences of the D-serine deaminases from strains of Escherichia coli K-12 that harbor wild-type and high-level constitutive catabolite-insensitive operator-initiator regions are identical: Met-Ser-GluNH2-Ser-Gly-Arg-His-Cys. This result indicates that the operator-initiator region is probably distinct from the D-serine deaminase structural gene.

N-terminal amino acid sequences of D-serine deaminases of wild-type and operator-constitutive strains of Escherichia coli K-12