Where Is Histidine Found?

Histidine, similar to other amino acids, is found primarily in high-protein foods. Meat, poultry, fish, dairy and some grain products including rice, wheat and rye are therefore histidine-containing foods.

Where is histidine found in the human body?

The biosynthesis of histamine from histidine occurs via vitamin B-dependent decarboxylation reaction by histidine decarboxylase that occurs in multiple types of cells located throughout the body, particularly in the brain and stomach.

Where is histidine found in proteins?

Role in function: Histidines are the most common amino acids in protein active or binding sites. They are very common in metal binding sites (e.g. zinc), often acting together with Cysteines or other amino acids: Thus in this context, it is common to see Histidine replaced by Cysteine.