Preliminary Characterization Studies on the Neisseria catarrhalis Respiratory Electron Transport Chain

Abstract

The Neisseria catarrhalis respiratory electron transport system was examined in a sonic type particulate membrane fraction and shown to have a moderately active succinate as well as nonpyridine nucleotide-dependent dl -lactate oxidoreductase and a very active tetramethyl- p -phenylenediamine oxidase. l -Malate and l -glutamate oxidation were found to be dependent on pyridine nucleotides and exclusively associated with a soluble (or nonmembranous) fraction. The primary cytochrome components in the electron transport system appear to be c -type in nature (555 nm and 550 nm) as well as cytochrome a 1 (600 nm) and cytochrome o .