2025年1月31日 · An amino acid is an organic molecule that is made up of a basic amino group (−NH), an acidic carboxyl group (−COOH), and an organic group (or side chain) that is unique to each amino acid.

2025年1月17日 · Amino acid - Building Blocks, Structure, Functions: One of the most useful manners by which to classify the standard (or common) amino acids is based on the polarity (that is, the distribution of electric charge) of the R group (e.g., side chain).

amino acid, Any of a class of organic compounds in which a carbon atom has bonds to an amino group (―NH 2), a carboxyl group (―COOH), a hydrogen atom (―H), and an organic side group (called ―R). They are therefore both carboxylic acids and amines.

2025年1月14日 · Proteins are macromolecular polypeptides —i.e., very large molecules (macromolecules) composed of many peptide-bonded amino acids. Most of the common ones contain more than 100 amino acids linked to each other in a long peptide chain.

2025年1月22日 · An amino acid is an organic molecule that is made up of a basic amino group (−NH 2), an acidic carboxyl group (−COOH), and an organic R group (or side chain) that is unique to each amino acid. The term amino acid is short for α-amino [alpha-amino] carboxylic acid.

2025年1月17日 · Amino acids via their various chemical functionalities (carboxyls, amino, and R groups) can undergo numerous chemical reactions. However, two reactions (peptide bond and cysteine oxidation) are of particular importance because of their effect on protein structure.

2025年1月11日 · codon, in genetics, any of 64 different sequences of three adjacent nucleotides in DNA that either encodes information for the production of a specific amino acid or serves as a stop signal to terminate translation (protein synthesis).

Chemists define an amino acid as any group of organic molecules that consist of a basic amino group (–NH 2), an acidic carboxyl group (–COOH), and a specific organic side chain that is unique to each amino acid. Arginine, glycine, cystine, histidine, and …

2025年1月14日 · The physicochemical properties of a protein are determined by the analogous properties of the amino acids in it. The α-carbon atom of all amino acids, with the exception of glycine, is asymmetric; this means that four different chemical entities (atoms or groups of atoms) are attached to it.

2024年12月4日 · Arginine, an amino acid obtainable by hydrolysis of many common proteins but particularly abundant in protamines and histones, proteins associated with nucleic acids.