noun
- Plural of histidine; amino acids with an imidazole side chain, found in proteins and important in enzyme catalysis and metal binding.
Usage: biochemistry; plural form; essential amino acid in infants
Examples
- Histidines play a crucial role in the active sites of many enzymes.
- The protein contains several histidines that coordinate zinc ions.
- Histidines are among the 20 standard amino acids found in living organisms.
- The imidazole rings of histidines can act as both acid and base in biochemical reactions.
- Dietary sources of histidines include meat, poultry, and legumes.