Molecular biology

Molecular biology

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Molecular biology

Hill coefficient

Biology; Biochemistry

A measure of co-operativity, i.e. the number h in the equation (HbO 2 )/(Hb)=k(pO 2 ) h that empirically describes the dependence of haemoglobin (Hb) oxygenation on the partial pressure of ...

A colour reaction for the quantification of protein in solution. By analogy with the compound biuret (H 2 N-CO-NH-CO-NH 2 ), the peptide backbone of proteins reacts with alkaline copper solutions to ...

Shuttle vector

Biology; Biochemistry

A plasmid that has both bacterial and eukaryotic origins of replication and so can propagate in either kind of cell; useful as a form of recombinant DNA for growth in a bacterium and subsequent ...

Proto-

Biology; Biochemistry

Borrowing from historical linguistics, a prefix that denotes the simplest possible precursor of two or more organisms, inferred from phylogenetic trees reconstructed from polynucleotide sequences, ...

Selective pressure

Biology; Biochemistry

In evolutionary theory, the effect on survival of a species of the sum of all factors, physical and behavioral, inherent and environmental; especially as an inherited trait may marginally effect ...

Scatchard plot

Biology; Biochemistry

A graphical method for determination of a binding constant and the number of binding sites. The ratio of the amount of ligand (e.g. a hormone) that is bound (e.g. to a receptor) to the amount that is ...

Medium

Biology; Biochemistry

The solid or liquid substratum on which, or in which, cells or organ explants can be made to grow; a medium may include well defined factors such as salts, amino acids and sugars, as well as less ...