monobrominated L-phenylalanine 224.9789276123046875 226.07000732421875 77.91051483154296875 78.90000152587890625 A protein modification that effectively converts an L-phenylalanine residue to a monobrominated L-phenylalanine, such as L-2'-bromophenylalanine. Br 1 C 0 H -1 N 0 O 0 Br 1 C 9 H 8 N 1 O 1 Br1Phe Bromo F From DeltaMass: Average Mass: 78 Average Mass Change:78 References:Yoshino,K et.al. Biochemistry Vol. 30 pg 6203-9 (1991) Identifidation of a novel amino acid, o-bromo-L-phenylananine, in egg-associated peptides that activate spermatozoa MOD:00972 PSI-MOD Unimod:340 bromination natural monobrominated residue brominated phenylalanine