Search results
Results from the WOW.Com Content Network
Histidine ball and stick model spinning. Histidine (symbol His or H) [2] is an essential amino acid that is used in the biosynthesis of proteins.It contains an α-amino group (which is in the protonated –NH 3 + form under biological conditions), a carboxylic acid group (which is in the deprotonated –COO − form under biological conditions), and an imidazole side chain (which is partially ...
An aromatic amino acid is an amino acid that includes an aromatic ring. Phenylalanine Among the 20 standard amino acids , histidine , phenylalanine , tryptophan , tyrosine , are classified as aromatic.
Imidazole is the side chain of histidine and is typically used at a concentration of 150 - 500 mM for elution. Histidine or histamine can also be used. Decrease in pH; When the pH decreases, the histidine residue is protonated and can no longer coordinate the metal tag, allowing the protein to be eluted.
Aromatic acids are a type of aromatic compound. Included in that class are substances containing an aromatic ring and an organic acid functional group. There are several categories of aromatic acids including: Phenolic acids: substances containing an aromatic ring and an organic carboxylic acid function (C6-C1 skeleton). Aromatic amino acids [1]
The enzyme histidine decarboxylase (EC 4.1.1.22, HDC) is transcribed on chromosome 15, region q21.1-21.2, and catalyzes the decarboxylation of histidine to form histamine. In mammals, histamine is an important biogenic amine with regulatory roles in neurotransmission , gastric acid secretion and immune response .
Aromatic compounds or arenes are organic compounds "with a chemistry typified by benzene" and "cyclically conjugated." [1] The word "aromatic" originates from the past grouping of molecules based on odor, before their general chemical properties were understood. The current definition of aromatic compounds does not have any relation to their odor.
Chemical formula: C 6 H 9 N 3 O 2 ... (L-histidine) ^a CID 71083 from ... Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; ...
Help; Learn to edit; Community portal; Recent changes; Upload file; Special pages