The N-terminal amino acid sequence of the 60-kDa protein of purified dipeptidyl peptidase IV (DPP IV) was determined. The protein was isolated from rat kidney by detergent solubilization. The first 22 amino acids were sequenced; these matched the predicted sequence between residues 281 and 302 of the amino-terminal region of rat liver DPP IV.
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Iwaki-Egawa et al. (1993) studied this question.
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