L-HISTIDINE UNLABELED is a free, naturally occurring amino acid in the histidine class, featuring an imidazole-containing side chain attached to the alpha carbon bearing an amino group and a carboxyl group. The molecule exists with the standard amino and carboxyl functionalities appropriate for zwitterionic behavior in aqueous media, and the imidazole ring provides a basic, heteroaromatic site that can participate in acid-base equilibria while also serving as a hydrogen-bonding motif. As an unlabeled histidine building block, it is used in peptide and protein chemistry workflows and in analytical or biochemical studies that require the unmodified histidine residue without isotopic or other tracer tags.
CAT No: L-Iso-0305
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