Effect of age on creatine, nitrogen and phosphorus concentrations in the skeletal muscles of cockerels.

Effect of age on creatine, nitrogen and phosphorus concentrations in the skeletal muscles of cockerels. Acta physiol. pol., 1985, 36 (3): 201-207. In the studied life period from the age of 1 to 7 weeks the concentration of nitrogen increased in the muscles and that of phosphorus decreased. The relation between creatine concentration and the share of creatine nitrogen in the total nitrogen pool in the muscles, on the one hand, and the age, on the other hand, was curvilinear; the highest values were observed in cockerels aged 3 weeks. No significant differences were demonstrated in the concentrations of these components between the superficial pectoralis muscle and the deep pectoralis muscle. In the muscles of legs the concentrations of creatine, nitrogen and phosphorus were lower than in pectoralis muscles.