Molecular biology

Molecular biology

Contributors in Molecular biology

Molecular biology

The genetically programmed repression of transcription. Silencing may be the net effect of regulatory events that increase transcription and those which repress it (the analog model), or it may be an ...

depside

Biology; Biochemistry

An ester of two or more derivatives of orsellinic acid (1,2-dihydroxy-5-methylbenzoic acid). A depsidone is a depside in which the aromatic subunits are additionally coupled to each other by an ether ...

acetogenin

Biology; Biochemistry

A compound derived from acetyl units donated by acetyl- and/or malonyl-CoA units, assembled into a non-reduced polyketide, i.e. with the carbonyl groups intact, often, then, cross-linked by aldol ...

acetate rule

Biology; Biochemistry

The observation, first based on inspection of structures and later on experimentation, that many natural products appear to have been assembled from multiple acetate (acetyl-CoA and/or malonyl-CoA) ...

passive diffusion

Biology; Biochemistry

The transport of compounds across a membrane that is unmediated by any mechanism and is independent of energy sources, and therefore occurs at a rate that is determined by the area of the membrane, ...

double helix

Biology; Biochemistry

The arrangement in space of two polynucleotide chains in which each chain is wrapped around the other to form two antiparallel spirals. Each strand presents to the other the bases, purine to ...

Watson-Crick model

Biology; Biochemistry

The arrangement in space of two polynucleotide chains in which each chain is wrapped around the other to form two antiparallel spirals. Each strand presents to the other the bases, purine to ...