The defining feature of an amino acid is its side chain (at top, blue circle; below, all colored circles). When connected together by a series of peptide bonds, amino acids form a polypeptide ...

Each of the 20 amino acids has a specific side chain, known as an R group, that is also attached to the α carbon. The R groups have a variety of shapes, sizes, charges, and reactivities.

The various alpha amino acids differ in which side chain (R group) is attached to their alpha carbon. They can vary in size from just a hydrogen atom in glycine, through a methyl group in alanine ...

Amino acids possess distinct pK a s for the carbonyl group, amino group, and any functional groups on the side chain that may be protonated or deprotonated. There is always one more structure than ...

These amino acids are grouped together because they are the only three amino acids to have a chain that branches off to one side. Like all amino acids, BCAAs are building blocks your body uses to ...

One included amino acids with linear side chains such as norvaline and norleucine. The other included the amino acid 2,4-diaminobutyric acid, which is basic.

Amino acids have a basic backbone made of an amino group and a carboxyl group, and differ in their side-chains. These polypeptide chains of amino acids can be shaped as helixes or sheets, which ...