[A study on actin-like protein biosynthesis in rat liver mitochondria].

The in vitro experiments revealed no incorporation of amino acids into actin-like protein of isolated rat liver mitochondria. The method of pulse label showed the presence of [14C]actin-like protein in mitochondria of intact animals which were not administered cycloheximide. A new synthesized actin-like protein is identified in mitochondria as a labelled polypeptide with apparent molecular weight 42 kDa. The data obtained may evidence for cytoplasmic localization of mitochondrial actin-like protein biosynthesis.