| potassium channels | Cell membrane glycoproteins selective for potassium ions. (12 Dec 1998) |
|---|---|
| tandem | Term used to describe multiple copies of the same sequence in a polynucleic acid that lie adjacent to one another. (05 Mar 2000) |
| tandem repeat | <molecular biology> Copies of genes repeated one after another along a chromosome: for example the 40S rRNA genes in somatic cells of toads, of which there are about 500 copies. (18 Nov 1997) |
| tandem repeat sequence | <molecular biology> Multiple copies of the same base sequence on a chromosome, used as a marker in physical mapping. (09 Oct 1997) |
| tandem repeat sequences | Multiple copies of the same DNA base sequence on a chromosome; used as a marker in physical mapping of the chromosome. (12 Dec 1998) |
| M channels | Voltage sensitive K channels inactivated by acetylcholine. ACh acting at muscarinic AChR's produces an internal messenger that turns off this class of K channel. A mechanism for regulating the sensitivity of cells to synaptic input. (18 Nov 1997) |
| chloride channels | Cell membrane glycoproteins selective for chloride ions. (12 Dec 1998) |
| sodium channels | Cell membrane glycoproteins selective for sodium ions. Fast sodium current is associated with the action potential in neural membranes. (12 Dec 1998) |
| ion channels | Gated, ion-selective glycoproteins that traverse membranes. The stimulus for channel gating can be a membrane potential, drug, transmitter, cytoplasmic messenger, or a mechanical deformation. Ion channels which are integral parts of ionotropic neurotransmitter receptors are not included. (12 Dec 1998) |
| apple domain | <molecular biology> A consensus sequence, composed of 90 amino acids including 6 cysteines, that forms a characteristic, vaguely apple shaped, pattern via disulphide bridges. Shared by plasma kallikrein and coagulation factor XI, both serine proteases. (18 Nov 1997) |
| carboxy-terminal domain kinase | <enzyme> Protein kinase that phosphorylates the c-terminal repeat domain of the largest subunit of RNA polymerase II at serine residues Registry number: EC 2.7.1.- Synonym: ctd kinase, hs-ctd kinase, tfiih-associated ctd kinase (26 Jun 1999) |
| paired box domain | <molecular biology> Conserved domain of 128 amino acids, found in several developmentally regulated proteins in Drosophila (for example paired, gooseberry, Pox), mouse and human (for example Pax, HuP1, HuP48). (18 Nov 1997) |
| gustatory pore | The minute opening of a taste bud on the surface of the oral mucosa through which the gustatory hairs of the specialised neuroepithelial gustatory cells project. Synonym: porus gustatorius, taste pore. (05 Mar 2000) |
| water pore | 1. <zoology> A pore by which the water tubes of various invertebrates open externally. 2. <botany> One of certain minute pores in the leaves of some plants. They are without true guardian cells, but in other respects closely resemble ordinary stomata. Source: Websters Dictionary (01 Mar 1998) |
| pore | 1. One of the minute orifices in an animal or vegetable membrane, for transpiration, absorption, etc. 2. A minute opening or passageway; an interstice between the constituent particles or molecules of a body; as, the pores of stones. Origin: F, fr. L. Porus, Gr. A passage, a pore. See Fare. Source: Websters Dictionary (01 Mar 1998) |