amino group
Noun
Meaning
the radical -NH2
Source: WordNetSynonyms
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Examples
An α-amino acid has a central carbon (the α or alpha carbon ) which is covalently bonded to a carboxyl group (thus they are carboxylic acids ), an amino group, a hydrogen atom and a variable group.
However, additional molecular interactions may render the amide form less stable; the amino group is expelled instead, resulting in an ester (Ser/Thr) or thioester (Cys) bond in place of the peptide bond.
A one-carbon unit from folic acid coenzyme N 10 -formyl-THF is then added to the amino group of the substituted glycine followed by the closure of the imidazole ring.
Guanine has the C-6 carbonyl group that acts as the hydrogen bond acceptor, while a group at N-1 and the amino group at C-2 act as the hydrogen bond donors.
In the chemical synthesis, the two carboxyl groups of aspartic acid are joined into an anhydride, and the amino group is protected by converting it to a functional group that will not interfere in the next reaction.
Deamination occurs when an amino group is lost and is a mutation that often results in base changes.