Recognizes Glutamate (L-Glutamate). Calibrated against a spectrum of antigens to assure hapten selectivity and proper affinity. No measurable cross-reactivity (<1:100) against glutamate in peptides or proteins. No measurable glutaraldehyde-fixed tissue cross-reactivity (<1:1000) against L-alanine, gamma-aminobutyrate, 1-amino-4-guanidobutane (AGB), D/L-arginine, D/L-aspartate, L-citrulline, L-cysteine, D/L glutamine, glutathione, glycine, L-lysine, L-ornithine, L-serine, taurine, L-threonine, L-tryptophan, L-tyrosine. Modest cross-reactivity (1:8) against free NAAG in competition assays (NAAG is not retained in glutaraldehyde-fixed tissue).