The relative importance of muscle protein synthesis and breakdown in the regulation of muscle mass

Protein turnover in rats treated with trienbolone acetate

1. The anabolic agent Trienbolone acetate (3-oxo-17-beta-hydroxy-4,9,11-estratriene acetate) given subccutaneously to female rats increased their growth ratndrogenic activity. 3. The fractional synthetic and fractional degradative rates of the mixed muscle proteins were smaller in the treated rats than in the control rats.