Comparison of Respiratory Enzyme Levels in Tissues of Mammals of Different Sizes

Abstract

Succinoxldase and malic dehydrogenase activities from tissues of the cow, rat, and mouse varied inversely with body size, having the least activity in the brain, heart, kidney, and liver tissue of the cow and the highest activity in the corresponding tissues of the mouse. No significant difference in enzyme activity of tissues from animals of the same spp., even with considerable variation in body wt., was observed.