THE SIMPLEST PROLINE-CONTAINING PEPTIDES PG, GP, PGP, AND GPGG - REGULATORY ACTIVITY AND POSSIBLE SOURCES OF BIOSYNTHESIS

Our own data and data from the literature on the regulatory role of th e simplest proline-containing peptides GP, PG, PGP, GPGG, and cyclic-P G are summarized. These peptides are involved in homeostasis of gastri c mucosa and the anticoagulant and fibrinolytic potential of blood pla sma. They also potentiate memory consolidation processes in the centra l nervous system. The most probable sources of these peptides are poly peptide precursors of collagen, elastin, and enterostatin.