Cyclophorase System XXIII. Correlation of Cyclophorase Activity and Mitochondrial Density in Striated Muscle.

Abstract

A study was made of the cyclophorase-mitochondrial system in the striated musculature of the rabbit, pigeon, chicken, rat and bat. The skeletal muscles used generally had only sporadically low cyclophorase activity (manometric assay) and low mitochondrial density (phase microscope); whereas muscles which functioned either continuously or for prolonged periods (diaphragm, cardiac muscles, muscles of flight) had high cyclophorase activity and abundance of mitochondria.