omega-N-phospho-L-arginine (2S)-2-amino-5-(N'-phosphonocarbamimidamido)pentanoic acid (2S)-2-amino-5-([amino(phosphonoamino)methylidene]amino)pentanoic acid 236.06744384765625 236.1699981689453125 79.96633148193359375 79.98000335693359375 A protein modification that effectively converts an L-arginine residue to omega-N-phospho-L-arginine. C 0 H 1 N 0 O 3 P 1 C 6 H 13 N 4 O 4 P 1 MOD:00227 MOD_RES Phosphoarginine N(gamma)-phosphoarginine N(omega)-phosphono-L-arginine N5-[imino(phosphonoamino)methyl]-L-ornithine PArg PSI-MOD Phospho Phosphorylation R Unimod:21 alpha-amino-delta-phosphonoguanidinovaleric acid natural omega-N-phospho-L-arginine phosphoarginine uniprot.ptm:PTM-0250 modified L-arginine residue N-phosphorylated residue