[Half-life of rabbit heart mitochondria under normal conditions and in experimental allergic lesions of the heart].

Half-life of mitochondrial proteins and cytochrome C of rabbit myocardium was determined with glycine-I-C14 and H3-5-aminolevulinic acid, respectively, as precursors. Half-life of mitochondrial proteins calculated from the curve of the gradual radioactivity decline was 14.4 days, and that of cytochrome C--11.8 days; reutilization of glycine-C14 in plastic metabolism did not exceed 20%. No difference from control was noticed in rabbits with an experimental allergic heart damage.