Abstract: The extraction Of L-hydroxypforine (L-HP) and L-proline (L-P) from gelatin has been studied. The hydrolysis of collagen with L-HP as the purpose amino acid was examined. Imino acid was extracted from hydrolysate by means of the invertibiliyty of indno arid nitrosylation and L-HP and L-P were separated by chromatography using D61 cation exchange resin. The purified L-HP and L-P were crystal and the yields were 4. 5% and 4% respctively.

Key words: Gelatin, Extract, L-hydroxyproline, L-proline