The charged ammonium nitrogen is closest to the side-chain of alpha4 Trp182.

Amino acids are usually classified by the properties of their side-chain into four groups.

It differs from valproic acid simply by lacking a 3-carbon side-chain.

The enzyme uses the ammonia group from the glutamine side-chain.

It is this R, or side-chain, that is different in each amino acid.

To eliminate most of the side-chain, K61A introduces alanine at this position.

The imidazole nitrogen of a histidine side-chain is a common ligand.

These involve 2 hydroxylations of the cholesterol side-chain, which generate, first, 22R-hydroxycholesterol and then 20alpha,22R-dihydroxycholesterol.

Rotamer analysis - check for unusual protein side-chain conformations.

It has carboxamide as the side-chain's functional group.

The chemical structure can be considered in terms of two components, a macrotricyclic segment and a heterocyclic side-chain.

The most pervasive is the amino acid histidine, which has an imidazole side-chain.

For amino acids with charged side-chains, the pKa of the side-chain is involved.

The numbers for that type of side chain will be grouped in ascending order and written before the name of the side-chain.

Hydroxyglycine, an amino acid with a hydroxyl side-chain, is highly unstable.

It turned out to be related to tyrosine, differing in its possession of a sort of doubled side-chain.

Cephalosporin C contains a side-chain which is derived from D-aminoadipic acid.

The stereochemistry of the tert-butyl side-chain in the illicitly sold product is unresolved.

All three contain an alkylidenyl side-chain.

Sometimes the side-chain is very simple in structure; it may even be nothing more than a hydrogen atom in the very simplest case.

The most important groups are the 5-methoxy group and the acylaminoethyl side-chain, because they bind to and activate the receptors.

V29A reduces the size of the side-chain, asking whether Val29 approaches the A's closely enough to provide a stacking-like interaction.

The next step involves condensation of this polyisoprenoid side-chain with 4-hydroxybenzoate, catalyzed by polyprenyl-4-hydroxy benzoate transferase.

Several molecular species of platelet-activating factor that vary in the length of the O-alkyl side-chain have been identified.

It has the amphetamine-backbone present, except that the R has a complicated imine side-chain present.