Abstract
The content of NADH and NADPH was measured in the intact and regenerating rat liver. In the intact rat liver, the content of NAD+, NADH, NADP+ and NADPH was 235 +/- 6.4, 66.6 +/- 4.3, 73.3 +/- 2.5 and 148.0 +/- 4.6 micrograms/g crude liver weight, respectively. Seasonal alterations in the rat liver content of coenzymes were established. No changes were found in the content of nicotinamide coenzymes in the regenerating liver 4 and 18 h after operation. Twenty-four hours after operation, a 25.6% increase in the content of NAD+ and a 57.8% reduction in the NADH content were recorded in the liver of hepatectomized animals. At the same time the total content of NAD+ plus NADH changed but insignificantly (14.7%). The total content of NADP+ plus NADPH dropped by 29.8% (within the above period). Thirty-two hours after operation the content of all the nicotinamide coenzymes returned to the initial level.
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