A repressor found in λ phage (a bacteriophage that particularly infects the human digestive bacteria, E. coli) which turns off genetic transcription at the phage's L and R promoters, and thus prevents multiple phages from infecting a single host.

(biochemistry) Proteins that bring together various other proteins in a signaling pathway and allow for their interaction. They recruit downstream effectors in a pathway and enhance specificity of the signal.

A protein found on the surface of many mammalian cell types, especially neurons. The normal function of the prion protein is not known.

(biochemistry) Any of a class of proteins, found in cell membranes, that pass signals between hormone receptors and effector enzymes

(biochemistry) A protein whose inactivation by mutation leads to the formation of retinoblastomas.

(biochemistry) The binding of phosphate to proteins to form phosphoproteins.

(biochemistry) Any protein that forms assemblies with others, especially those that form multimers or oligomers.

Alternative spelling of G protein

(informal, biochemistry) Any protein that normally exists combined with another entity (metal, carbohydrate or lipid etc), free from its normal attachment.

(biochemistry) Any of a family of small proteins that attach themselves to other proteins within cells and modify their function