Histidine - His - structure, properties, function, benefits
2023年11月22日 · Histidine is usually referred to as a semi-essential amino acid because it is nonessential in adults but is essential in the diet of infants and individuals with uremia - a …
Histidine - Wikipedia
The tautomerism and acid-base properties of the imidazole side chain has been characterized by 15 N NMR spectroscopy. The two 15 N chemical shifts are similar (about 200 ppm, relative to …
Biochemistry, Histidine - StatPearls - NCBI Bookshelf
2023年7月30日 · Histidine’s imidazole side chain is unique amongst amino acids, giving rise to its aromaticity and amphoteric properties at physiologic pH. This property makes histidine a key …
2.2: Structure & Function - Amino Acids - Biology LibreTexts
2024年3月21日 · Histidine (His/H) is the only one of the proteinaceous amino acids to contain an imidazole functional group. It is an essential amino acid in humans and other mammals. With a …
Histidine Structure, Functions, Chemical Properties, and Benefits
What is Histidine? Histidine is an essential amino acid that plays a vital role in the biosynthesis of proteins. It comprises a carboxylic acid group, α-amino group, and an imidazole side chain …
Proton Transfer Kinetics in Histidine Side Chains Determined by …
2024年8月5日 · Histidine is a key amino-acid residue in proteins with unique properties engendered by its imidazole side chain that can exist in three different states: two different …
Histidine Metabolism and Function - The Journal of Nutrition
The imidazole side chain of histidine in proteins, such as actin, may be methylated in the N-3 position, using S-adenosylmethionine as methyl donor.
The multiple roles of histidine in protein interactions
2013年3月1日 · The side chain imidazole of His is an aromatic ring. Histidine can take part in the cation-π interactions as the aromatic motif with metallic cations or organic cations (protonated …
Histidine biosynthesis, its regulation and biotechnological …
Its side-chain is an imidazole ring and therefore has aromatic properties. Histidine is the only amino acid whose side-chain can switch from an unprotonated to a protonated state under …
2D IR Spectroscopy of Histidine: Probing Side-Chain Structure …
2014年7月7日 · The imidazole side chain of histidine can adopt two tautomeric forms and can ionize at near-neutral pH. Thus, histidine plays a key role in many enzymatic reactions and …