What is "phosphocreatine"

n. (context biochemistry English) A phosphorylated derivative of creatine that is used in muscles to store chemical energy

n. an organic compound of creatine and phosphoric acid; found in the muscles of vertebrates where its hydrolysis releases energy for muscular contraction [syn: creatine phosphate, creatine phosphoric acid]

Phosphocreatine, also known as creatine phosphate (CP) or PCr (Pcr), is a phosphorylated creatine molecule that serves as a rapidly mobilizable reserve of high-energy phosphates in skeletal muscle and the brain.