side chain


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chain

 [chān]
a collection of objects linked together in linear fashion, or end to end, as the assemblage of atoms or radicals in a chemical compound, or an assemblage of individual bacterial cells.
branched chain an open chain of atoms, usually carbon, with one or more side chains attached to it.
closed chain several atoms linked together so as to form a ring, which may be saturated, as in cyclopentane, or aromatic, as in benzene.
H chain (heavy chain) any of the large polypeptide chains of five classes that, paired with the L or light chains, make up the antibody molecule of an immunoglobulin; heavy chains bear the antigenic determinants that differentiate the classes of immunoglobulins. See also heavy chain disease.
J chain a polypeptide occurring in polymeric IgM and IgA molecules.
L chain (light chain) either of the two small polypeptide chains (molecular weight 22,000) that, when linked to H or heavy chains by disulfide bonds, make up the antibody molecule of an immunoglobulin monomer; they are of two types, kappa and lambda, which are unrelated to immunoglobulin class differences.
open chain a series of atoms united in a straight line; components of this series are related to methane.
chain reaction a chemical reaction that is self-propagating; each time a free radical is destroyed a new one is formed.
side chain a group of atoms attached to a larger chain or to a ring.

side chain

1. a chain of noncyclic atoms linked to a benzene ring, or to any cyclic chain compound;
2. the atoms of an α-amino acid other than the α-carboxyl group, the α-amino group, the α-carbon, and the hydrogen attached to the α-carbon.

side chain

(sīd chān)
1. A chain of noncyclic atoms linked to a benzene ring, or to any cyclic chain compound.
2. The atoms of an α-amino acid other than the α-carboxyl group, the α-amino group, the α-carbon, and the hydrogen attached to the α-carbon.

side chain

commonly referred to as −R; group that confers specific identity to compounds, particularly amino acids.
References in periodicals archive ?
12, it indicates that not only space between side chain and backbone decreases to form interaction but also binding-like structures develop to increase rigidity of backbones, which explain perfectly that the tensile strength and initial modulus of the ODPA-DABBE6 system are higher than that of the ODPA-DABBE0, particularly, the initial modulus.
The decrease in the fraction of free mobile lithium ions with PEO side chain length is related to the increase of crystallinity, since the ionic motion is considerably limited i the crystalline region.
Figures 8 and 9 show the relationship between the strain and the orientation functions of the transition dipole moment of the polymer main chains and ester groups in the side chains of PMMA, PTFEMA, PPhMA, and PPFPhMA.
The use of a slightly higher anhydride-toprotein ratio results in the acetylation of not only lysines, but serine, arginine, asparagine, histidine, tyrosine, glutamine, and cysteine side chains as well.
7) In the present case, the increased flexibility was likely to be due to the increased flexibility imparted by the long aliphatic side chains attached to the acrylic.
These side chains-the 15-carbon side chain is a farnesyl side chain, and the 20-carbon side chain is a geraynlgeranyl side chain-are produced through the HMG-CoA/mevalonate pathway, the same pathway that is inhibited by the statins, drugs that inhibit HMG-CoA reductase.
Prior to the crystal structure determination, molecular modeling indicated that the [beta]Thr67 side chain hydroxyl group in the distal beta-heme pocket forms a hydrogen bond with the backbone carbonyl of [beta]His63 and is within hydrogen-bonding distance of the ND atom of [beta]His63.
The polymeric additive includes a polymeric backbone having substituents attached thereto, wherein the substituents include at least one urethane linked nitrogen bonded side chain having about 5 carbon atoms or more and a terminal methyl group and at least one oxygen linked water solubilizing group.
The compound of choice was to have one of the-methyl groups replaced by a longer side chain containing an oxygen atom with the rest of the molecule being a di-methyl Xanthine.
The syntheses of A, B, and C are shown in Scheme 1(a), and their side chain contents are shown in Table 1.
The bioavailability of nutritional vitamin K depends on the type of food, the dietary fat content, the length of the aliphatic side chain in the K-vitamer and probably also the genetically determined polymorphism of apolipoprotein E.
291) studied phthalate metabolite concentrations in maternal urine (collected during the third trimester) and target gene expression in placenta tissue obtained at delivery from 54 African-American and Dominican study participants, including genes involved in steroidogenesis (aromatase, cholesterol side chain cleavage enzyme, 17[beta]-hydroxysteroid dehydrogenase type 1, and cytochrome P450 1B1 genes) and genes involved in trophoblast differentiation (PPAR[gamma], aryl hydrocarbon receptor, and human chorionic gonadotropin genes).