Molecular biology

Molecular biology

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Molecular biology

Frictional coefficient

Biology; Biochemistry

A measure of the size and asymmetry of a molecule in solution, derived from hydrodynamic measurements, e.g. diffusion, ultracentrifugation, mobility in electrophoresis; equal to RT/ND, qE/v, and ...

Cytokine

Biology; Biochemistry

A factor secreted by a cell that affects other cells, often as part of an immunological response; e.g. an interleukin or an interferon (but some cytokines are also involved in co-ordinating ...

Radiation-induced hybrid mapping

A method for location of a human genetic marker within a restricted region of a single chromosome. A hybrid cell line that contains a specific single human chromosome in each recipient rodent cell is ...

Competitive PCR

Biology; Biochemistry

A variation of PCR to make it a semi-quantitative assay for a polynucleotide. A new restriction site is introduced into the polynucleotide to be assayed so that, when an unknown quantity of the ...

Centrifugal elutriation

Biology; Biochemistry

A method for separation of isolated cells according to their characteristic sedimentation rates in a centrifuge rotor which is designed to allow flow-through of a fluid during operation; also known ...

Additivity

Biology; Biochemistry

The principle of thermodynamics that free energy (or enthalpy of entropy) is a sum of contributions of independent components, e.g. the free energy of a protein transition is the sum of free energy ...

Canyon hypothesis

Biology; Biochemistry

A proposal to reconcile both the necessary invariability, and apparent non-immunogenicity, of the host cell receptor attachment site of a virus (e.g. a rhinovirus), and the ability of the same virus ...