The non-protein introgenous constituents of the tissues of the freshwater crayfish Astacus pallipes lereboullet

Abstract

1. 1. The non-protein nitrogenous substances of the tissues of the freshwater crayfish Astacus pallipes have been examined by chromatographic methods. 2. 2. About 80 per cent of the non-protein nitrogen of abdominal muscle and 70 per cent of the non-protein nitrogen of the hepatopancreas has been accounted for. 3. 3. With the exception of betaine all the non-protein nitrogenous substances found by Kermack et al. (1955) in tissues of the marine decapped Homarus vulgaris were found in the tissues of Astacus pallipes. 4. 4. The concentrations of non-protein nitrogenous substances were much lower in the tissues of Astacus pallipes than in the tissues of Hamarus vulgaris. 5. 5. The presence of phosphorylethanolamine and of glycerylphosphorylethanolamine in the hepatopancreas of Astacus pallipes is reported.