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.
References in periodicals archive ?
When the temperature was increased to 180-400 AdegC, the aliphatic side chains began to fracture, and the fist step of mass loss occurred with the escape of small molecules of poor thermal stability.
Side chains of L203, I204, L135, and F136, which form hydrophobic cluster in H-conformation, are shown with grey spheres of van der Waals radii.
This means that both the hydro- and oleo-phobicities of the air-side surface significantly increased with the introduction of the fluorinated side chains. This water contact angle is very close to that for the bisphenol-A type epoxy resin system (14) modified with the monofunctional epoxy monomer that has the same number of repeated units -[(C[F.sub.2]).sub.6]- in the fluorinated chain.
To study the effects of active groups in the side chains of compatibilizer on the miscibility of blends, we also synthesized polysiloxane-g-(3,7-dimethyl-6-octylene) (polymer D).
We speculated that the unique three-dimensional shape of the lipophilic side chain may play an important role in allosteric activation of the channels through hydrophobic interactions.
Removing sugar side chains from the glycoproteins ML I, ML II and ML III results in an increase of the galNAc-binding ability and a decrease of gal binding.
Key statement: A rubber composition comprising (A) an organopolysiloxane end-capped with alkenyldialkylsiloxy, radicals and free of aliphatic unsaturation, (B) an organipolysiloxane containing three alkenyl radicals on molecular side chains, (C) an organohydrogenpolysiloxane, (D) fumed silica and (E) an addition reaction catalyst forms a seal member having improved strength and reduced compression set and useful for sealing a polymer electrolyte fuel-cell separator.
At 4 [Angstrom], the backbone may appear connected, but side chains might not be very distinguishable.
The laminate is made up of a mixture of silicone-modified low density polyethylene (LDPE), which is a LDPE graft copolymer with LDPE main chains and silicone side chains chemically bonded thereto, and which is a prereacted, linear crosslinked thermoplastic material.
The machine is available with side belt glass (side chains optional) control and offers ease of operation in L.H.
Second- and third-generation cephalosporins modified in size and the complexity of their side chains (eg, cefprozil, cefuroxime, ceftazidime, cefpodoxime, and ceftriaxone) were different enough from penicillin and ampicillin that they did not increase risk of allergic cross-reactivity (TABLE 1).
For patients who do report a true allergic history--or who have had a positive skin test--it would be prudent to avoid the four cephalosporins with side chains similar to amoxicillin--namely cefaclor, cefprozil, cephalexin, and cefadroxil.