| NF | nafcillin; National Formulary; nephritic factor; neurofibromatosis; neurofilament; neutral fraction;... |
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| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
| NF | Neuro-Fibromatosis = Von Recklinghausen's Disease NF 1; Neuro-Fibroma... |
| PFKL | phosphofructokinase, liver type; 6-phosphofructo-2-kinase, liver type |
| PFKP | phosphofructokinase, platelet type; 6-phosphofructo-2-kinase, platelet type |
| receptors, fc | Molecules found on the surface of some, but not all, B-lymphocytes, T-lymphocytes, and macrophages, which recognise and combine with the fc (crystallizable) portion of immunoglobulin molecules. (12 Dec 1998) |
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| receptors, fibronectin | Specific sites or molecular structures on or in cells with which fibronectins react or to which they bind. Studies have shown that these receptors function in certain types of adhesive contact as well as playing a major role in matrix assembly. These are the traditional fibronectin receptors, also called vla-5 receptors or alpha 5 beta 1 integrins. There are also other integrins that bind fibronectin, including alpha v beta 1. (12 Dec 1998) |
| Receptors for activated C Kinase | Synonym for endosome. (18 Nov 1997) |
| receptors, fsh | Cell surface proteins that bind follicle-stimulating hormone (follitropin, fsh) with high affinity and trigger intracellular changes influencing the behaviour of cells. (12 Dec 1998) |
| receptors, gaba | Cell-surface proteins that bind gaba with high affinity and trigger changes that influence the behaviour of cells. Gaba-a receptors control chloride channels formed by the receptor complex itself. They are blocked by bicuculline and usually have modulatory sites sensitive to benzodiazepines and barbiturates. Gaba-b receptors act through g-proteins on several effector systems, are insensitive to bicuculline, and have a high affinity for l-baclofen. (12 Dec 1998) |
| receptors, gaba-a | Cell surface proteins which bind gaba and control an integral membrane chloride channel. Gaba-a receptors are the most prevalent inhibitory neurotransmitter receptors in the brain. Several isoforms have been cloned, and they belong to a superfamily which includes nicotinic receptors, glycine receptors, and 5ht-3 receptors. Most gaba-a receptors have separate modulatory sites sensitive to benzodiazepines and to barbiturates. (12 Dec 1998) |
| receptors, gaba-b | Cell surface proteins which bind gaba and influence cells via interactions with g-proteins. Gaba-b receptors are pharmacologically characterised by their insensitivity to the blocker bicuculline and sensitivity to the agonist l-baclofen. They are found both presynaptically and postsynaptically, and act variously by inhibition of adenylate cyclase, activation of phospholipase a2, activation of potassium channels, and inactivation of voltage-activated calcium channels. (12 Dec 1998) |
| receptors, gastrointestinal hormone | Cell surface proteins that bind gastrointestinal hormones with high affinity and trigger intracellular changes influencing the behaviour of cells. most gastrointestinal hormones also act as neurotransmitters so these receptors are also present in the central and peripheral nervous systems. (12 Dec 1998) |
| receptors, glucagon | Cell surface receptors that bind glucagon with high affinity and trigger intracellular changes which influence the behaviour of cells. Activation of glucagon receptors causes a variety of effects; the best understood is the initiation of a complex enzymatic cascade in the liver which ultimately increases the availability of glucose to body organs. (12 Dec 1998) |
| receptors, glucocorticoid | Cytoplasmic proteins that specifically bind glucocorticoids and mediate their cellular effects. The glucocorticoid receptor-glucocorticoid complex acts in the nucleus to induce transcription of DNA. Glucocorticoids were named for their actions on blood glucose concentration, but they have equally important effects on protein and fat metabolism. Cortisol is the most important example. (12 Dec 1998) |
| receptors, glutamate | Cell-surface proteins that bind glutamate and trigger changes which influence the behaviour of cells. Glutamate receptors include ionotropic receptors (ampa, kainate, and n-methyl-d-aspartate receptors), which directly control ion channels, and metabotropic receptors which act through second messenger systems. Glutamate receptors are the most common mediators of fast excitatory synaptic transmission in the central nervous system. They have also been implicated in the mechanisms of memory and of many diseases. (12 Dec 1998) |
| receptors, glycine | Cell surface receptors that bind glycine with high affinity and trigger intracellular changes which influence the behaviour of cells. Glycine receptors in the central nervous system have an intrinsic chloride channel and are usually inhibitory. (12 Dec 1998) |
| receptors, gonadotropin | Those protein complexes or molecular sites on the surfaces of gonadal and other sensitive cells that bind gonadotropins and thereby modify the functions of those cells; hcg, lh, and fsh are the major specific gonadotropins. (12 Dec 1998) |
| receptors, histamine | Cell-surface proteins that bind histamine and trigger intracellular changes influencing the behaviour of cells. Histamine receptors are widespread in the central nervous system and in peripheral tissues. Three types have been recognised and designated h1, h2, and h3. They differ in pharmacology, distribution, and mode of action. (12 Dec 1998) |
| receptors, histamine h1 | A class of histamine receptors discriminated by their pharmacology and mode of action. most histamine h1 receptors operate through the inositol phosphate/diacylglycerol second messenger system. Among the many responses mediated by these receptors are smooth muscle contraction, increased vascular permeability, hormone release, and cerebral glyconeogenesis. (12 Dec 1998) |