this activity involves the exchange of the terminal gamma-glutamyl residue ( where pteglu represents pteroylglutamic acid ) of h4pteglu-gamma-glu , pteglu-gamma-glu , or p-aminobenzoyl-glu-gamma-glu for an amino acid such as [ 14c ] glutamic acid , [ 14c ] methionine , [ 14c ] glutamine , or [ 14c ] glycine .
C0002520
amino acid
C0061472
glutamic acid