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Quantitative Analysis of Pyroglutamic Acid in Peptides,

✍ Scribed by Suzuki, Yoshio; Motoi, Hirofumi; Sato, Kenji

Book ID
126844956
Publisher
American Chemical Society
Year
1999
Tongue
English
Weight
15 KB
Volume
47
Category
Article
ISSN
0021-8561

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Several useful procedures in the amino acid sequence analysis of polypeptides depend upon chemical reactions of the terminal a-amino group. Blockage of this group because of an amino-terminal pyroglutamyl residue is, therefore, a severe hindrance to the structural study of a polypeptide or protein.

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## Abstract __N__‐terminal modification of peptides by unnatural amino acids significantly affects their enzymatic stability, conformational properties and biological activity. Application of __N__‐amidino‐amino acids, positively charged under physiological conditions, can change peptide conformati