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M R Pai

Publications and source records attributed to M R Pai.

10 recordsLinked to original sources

Pathways of glucose catabolism in Mycobacterium smegmatis.

Glucose metabolism in Mycobacterium smegmatis was investigated by the radiorespirometric method and by assaying for key enzymes of the major energy-yielding pathways. Glucose is oxidized in this organism mainly through the Embden-Meyerhof-Parnas pathway, irrespective of the carbon source used for growth. The pentose phosphate pathway plays only a minor role and its extent depends on the carbon source used for growth. Enzymes of glycolytic and oxidative pathways were detected in cells grown on glucose, glycerol, or pyruvate but enzymes of the Entner-Duodroff pathway could be detected only in glucose-grown cells. Labeled acetate is utilized by cells cultured on glucose, glycerol, and pyruvate. In all cases more of C1 of acetate was converted to CO2 while incorporation into cellular constituents was maximum from C2 of acetate.

Acetates

Effect of coumarins on mitochondrial function.

Several derivatives of coumarin inhibited mitochondrial respiration and ATPase activity. The extent of inhibition depended on the concentration of the coumarins as well as on the substituents of the coumarin ring. Some of the coumarins stimulated ATPase activity, but all of them inhibited uncoupler-stimulated ATPase activity. Coumarins with free or substituted phenolic groups were found to exert profound effects on respiration and ATPase activity.

Adenosine Triphosphatases