L-aspartic 4-phosphoric anhydride 194.9932708740234375 195.07000732421875 79.96633148193359375 79.98000335693359375 A protein modification that effectively converts an L-aspartic acid residue to L-aspartic 4-phosphoric anhydride. beta-aspartyl phosphate 2-azanyl-4-oxo-4-(phosphonooxy)butanoic acid C 4 H 6 N 1 O 6 P 1 2-aminobutanedioic 4-phosphoric anhydride (2S)-2-amino-4-oxo-4-(phosphonooxy)butanoic acid L-aspartic 4-phosphoric anhydride 4-phosphorylated L-aspartatic acid PAsp MOD:00042 4-phosphoaspartic acid D natural Phosphorylation MOD_RES 4-aspartylphosphate Phospho H 1 O 3 P 1 ACT_SITE 4-aspartylphosphate intermediate 4-oxo-O-phosphono-L-homoserine PSI-MOD none modified L-aspartic acid residue O-phosphorylated residue