| ITPK | inositol 1,4,5-triphosphate-3-kinase |
|---|---|
| ITPKA | inositol 1,4,5-triphosphate-3-kinase A |
| ITPKB | inositol 1,4,5-triphosphate-3-kinase B |
| ITPR | inositol 1,4,5-triphosphate receptor |
| inositol NAD epimerase | <enzyme> Converts myo-inositol to scyllo-inositol and neoinositol; inosose also formed and reverse reaction Registry number: EC 1.1.1.- (26 Jun 1999) |
|---|---|
| inositol O-methyltransferase | <enzyme> From mesembryanthemum crystallinum; uses s-adenosyl-l-methionine to methylate myo-inositol to form d-ononitol; monomeric mass 41 kD; has been sequenced Registry number: EC 2.1.1.- Synonym: myo-inositol o-methyltransferase, imt1 enzyme (26 Jun 1999) |
| inositol pentakisphosphate kinase | <enzyme> Has pronounced substrate specificity for d-inositol-1,2,4,5,6-pentakisphosphate which it converts to inositol hexakisphosphate Registry number: EC 2.7.1.- Synonym: insp5 kinase (26 Jun 1999) |
| inositol phosphate | Virtually all of the possible phosphorylated states of inositol have been reported to occur in living tissues. The hexaphosphate, phytic acid, is abundant in many plant tissues and is a powerful calcium chelator. See: phosphatidyl inositol 3 kinase. (18 Nov 1997) |
| inositol phosphates | Phosphoric acid esters of inositol. They include mono- and polyphosphoric acid esters, with the exception of inositol hexaphosphate which is phytic acid. (12 Dec 1998) |
| inositol polyphosphate 3-phosphatase | <enzyme> does not require magnesium and is not inhibited by lithium ions Registry number: EC 3.1.3.- Synonym: intp 3-phosphatase (26 Jun 1999) |
| inositol polyphosphate 4-phosphatase | <enzyme> Hydrolyzes the 4-position phosphate of phosphatidylinositol 3,4-bisphosphate Registry number: EC 3.1.3.- Synonym: ins polyp 4-phosphatase, ptdins(3,4)p2 4-phosphatase (26 Jun 1999) |
| inositol-tetrakisphosphate 1-kinase | <enzyme> A 46 kD enzyme from rat liver Registry number: EC 2.7.1.- Synonym: inositol 3,4,5,6-tetrakisphosphate 1-kinase, ins(3,4,5,6)p4 1-kinase (26 Jun 1999) |
| inositol triphosphate phosphomonoesterase | <enzyme> Human erythrocyte membrane enzyme converts inositol 1,4,5-trisphosphate into inositol 1,4-bisphosphate Registry number: EC 3.1.3.- Synonym: intp esterase, triphosphoinositide phosphomonoesterase, inositol triphosphate phosphatase, inositol triphosphate 5-phosphatase (26 Jun 1999) |
| inositol trisphosphate | Inositol 1, 4, 5 trisphosphate is important as a second messenger. It is released from phosphatidyl inositol bisphosphate by the action of a specific phospholipase C enzyme (PLC_) and binds to and activates a calcium channel in the endoplasmic reticulum. (18 Nov 1997) |
| adrenergic receptors | Reactive components of effector tissues, most of which are innervated by adrenergic postganglionic fibres of the sympathetic nervous system. Such receptor's can be activated by norepinephrine and/or epinephrine and by various adrenergic drugs; receptor activation results in a change in effector tissue function, such as contraction of arteriolar muscles or relaxation of bronchial muscles; adrenergic receptor's are divided into alpha-receptor's and beta-receptor's, on the basis of their response to various adrenergic activating and blocking agents. Synonym: adrenoceptor, adrenoreceptors. (05 Mar 2000) |
| alpha-adrenergic receptors | Adrenergic receptor's in effector tissues capable of selective activation and blockade by drugs; conceptually derived from the ability of certain agents, such as phenoxybenzamine, to block only some adrenergic receptor's and of other agents, such as methoxamine, to activate only the same adrenergic receptor's. Such receptor's are designated as alpha-receptors. Their activation results in physiological responses such as increased peripheral vascular resistance, mydriasis, and contraction of pilomotor muscles. (05 Mar 2000) |
| ANP clearance receptors | Cell surface proteins that bind atrial natriuretic peptide and ANP fragments without initiating biological action. (05 Mar 2000) |
| ANP receptors | Cell surface receptors for atrial natriuretic peptide that have a single transmembrane spanning element; these have integral kinase and guanylate cyclase domains. (05 Mar 2000) |
| B-cell antigen receptors | In the primary immune response immunoglobulin D and monomeric immunoglobulin M are the B-cell antigen receptors. On memory B-cells, other immunoglobulin molecules can serve as antigen receptors. (05 Mar 2000) |