phosphoarginine

phos·pho·ar·gi·nine

(fos'fō-ar'ji-nēn), A compound (in particular, a phosphagen) of l-arginine with phosphoric acid containing the phosphoamide bond; a source of energy in the contraction of muscle in invertebrates, corresponding to phosphocreatine in the muscles of vertebrates. Compare: phosphocreatine. Synonym(s): arginine phosphate