Abstract
Enzymatic and radiorespirometric analysis of several strains of cowpea rhizobia revealed the presence of key enzymes of the Entner-Doudoroff (ED) pathway with the operation of the hexose cycle for the dissimilation of gluconate. These bacteria lack the oxidative pentose phosphate (PP) pathway when grown on gluconate. Gluconate-grown cells possessed an operational tricarboxylic acid (TAC) cycle. Enzymes of an ancillary pathway, the ketogluconate (KG) pathway for gluconate catabolism were detected. The presence of this pathway was confirmed by techniques of thin-layer chromatography and radiorespirometry.
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