The presence of non-protein nitrogen in acetic acid-soluble calf-skin collagen
- 1 May 1962
- journal article
- research article
- Published by Portland Press Ltd. in Biochemical Journal
- Vol. 83 (2) , 240-244
- https://doi.org/10.1042/bj0830240
Abstract
Soluble calf-skin collagen and other collagenous proteins have been shown to contain a small quantity of non-protein-nitrogen material. The non-protein-nitrogen fraction contained 11 free amino acids which have been estimated quantitatively by the dintrophenylation technique. Three peptides have been isolated as dinitrophenyl derivatives from the non-protein-nitrogen fraction and their amino acid compositions have been determined. The origin of the non-protein-nitrogen fraction is briefly discussed.Keywords
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