Succinate as a respiratory inhibitor in Tenebrio molitor pupal-tissue preparations

Abstract

ASPARTIC DECARBOXYLASE OF NOCARDIA GLOBERULA 225 transamination mechanism. However, if a transamination reaction is taking place it is apparently concerned with some amino acid other than glutamic acid. SUMMARY 1. Acetone-dried powders of a strain of Nocardia globerula possess aspartic decarboxylase activity but are inactive towards all other amino acids tested. 2. The enzyme can be used for the quantitative estimation of L-aspartic acid in protein hydrolysates and is stable for long periods. I am indebted to the Medical Research Council for a Scholarship for Training in Research Methods. My thanks are also due to Dr S. V. Perry for a gift of [15N]aspartic acid, to Mr B. E. Boon for the operation of the mass spectrometer and to Mr M. W. Rees for a gift of edestin.

Polyphenol Oxidase in the Tegumental Glands in Relation to the Molting Cycle of the Isopod Crustacean Armadillidium Vulgare

“…It may be that the enzyme is involved in the metabolism of the glands and that the secretory product is some other material. Both mucus (Farkas, 1927) and lipid (Yonge, 1932) have been reported in tegumental glands, and there is evidence that tyrosinase (polyphenol oxidase) may function as a terminal oxidase in respiration, at least in plants and insects (Dawson and Tarpley, 1951 ;Patterson, 1958).…”