histydyny
Histydine is a common misconception of the amino acid histidine. Histidine is one of the twenty standard amino acids found in proteins. It is an alpha-amino acid with the chemical formula C6H9N3O2. The side chain of histidine contains an imidazole ring, which is a heterocyclic aromatic compound. This imidazole ring is unique among the amino acids because it can act as either an acid or a base at physiological pH. This amphoteric property makes histidine an important residue in the active sites of many enzymes, where it can participate in catalysis by donating or accepting protons.
Histidine is classified as a semi-essential or conditionally essential amino acid. This means that while the
The imidazole ring of histidine also plays a crucial role in binding to metal ions, such as