| calpactin | <protein> Calcium-binding proteins from cytoplasm. Calpactin II is identical to lipocortin and is one of the major targets for phosphorylation by pp60src. See: annexin (18 Nov 1997) |
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| calpain | <enzyme> Calcium activated cytoplasmic proteases containing the EF hand motif. Calpain I is activated by micromolar calcium, Calpain II by millimolar calcium. Calpain has two subunits, the larger (80 kD) has 4 domains one homologous with papain, one with calmodulin, the smaller (30 kD) has one domain homologous with calmodulin. First isolated from erythrocytes, but now described from other cells. (13 Oct 1997) |
| calpains | Calcium-dependent proteinases. Origin: calcium + suffix -pain, protease, fr. Papain (05 Mar 2000) |
| calpastatin | <protein> Cytoplasmic inhibitor of calcium activated protease, calpain. (18 Nov 1997) |
| Calpha-dehydrogenase | <enzyme> Isolated from pseudomonas paucimobilus; catalyses the oxidation of aryl-glycerol-beta-aryl ethers at the c(alpha)-alcohol to a carbonyl group Registry number: EC 1.1.1.- Synonym: ligd protein, ligd gene product, c(alpha)-dehydrogenase (26 Jun 1999) |
| calphobindins | Annexins V & VI (35 kD) found in placenta. Have substantial homology with lipocortin and may function like calelectrin. (18 Nov 1997) |
| calponin | <protein> Calcium and calmodulin binding troponin T like protein (34 kD) isolated from chicken gizzard and bovine aortic smooth muscle. Interacts with F actin and tropomyosin in a calcium sensitive manner and acts as a regulator of smooth muscle contraction (inhibits when not phosphorylated). Distinct from caldesmon and myosin light chain kinase, but has some antigenic cross reactivity with cardiac Troponin T. (18 Nov 1997) |