| molybdenum cofactor | A complex of molybdenum and molybdopterin required for a number of enzymes. A deficiency of this cofactor will result in lower activities of sulfite oxidase, xanthine dehydrogenase, and aldehyde oxidase causing elevated levels of sulfite, thiosulfite, xanthine, etc. (05 Mar 2000) |
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| cobra venom cofactor | <enzyme> A glycine-rich, heat-labile beta-glycoprotein found in blood. It is a proactivator of complement 3 in the alternate pathway of complement activation. Factor b is converted by factor d to c3 convertase. Registry number: EC 3.4.21.47 (12 Dec 1998) |
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| molybdenum | <chemistry> A rare element of the chromium group, occurring in nature in the minerals molybdenite and wulfenite, and when reduced obtained as a hard, silver-white, difficulty fusible metal. Symbol Mo. Atomic weight 95.9. Origin: NL., cf. F. Molybdene. See Molybdena. Source: Websters Dictionary (01 Mar 1998) |
| molybdenum-99 | A reactor-produced radioisotope of molybdenum with a half-life of 2.7476 days, used in radionuclide generators for the production of technetium-99m. (05 Mar 2000) |
| molybdenum breakthrough | <radiology> 0.15 uCi Mo-99 / mCi Tc-99m, must check EVERY elution of generator, use dose calibrator and lead shield, Mo-99 emits beta particles, has 67-hr half-life, it's taken up by liver (12 Dec 1998) |
| molybdenum-iron protein aldehyde oxidoreductase | <enzyme> Related to xanthine oxidase; isolated from desulfovibrio gigas Registry number: EC 1.2.7.- Synonym: mop protein (26 Jun 1999) |
| molybdenum target tube | An X-ray tube with an anode surface made of molybdenum instead of tungsten, used in mammography. (05 Mar 2000) |
| cofactor | <biochemistry> Inorganic complement of an enzyme reaction, usually a metal ions. See: coenzyme. (18 Nov 1997) |
| platelet cofactor I | A coagulation (clotting) factor. Classic haemophilia (haemophilia A) is due to a congenital deficiency in the amount (or activity) of factor VIII. Factor VIII is also known as antihemophiliac factor (AHF) or antihemophiliac globulin (AHG). The gene for factor VIII (that for classic haemophilia) is on the X chromosome so females can be silent carriers without symptoms and males can be haemophiliacs. (12 Dec 1998) |
| platelet cofactor II | <chemical> Storage-stable blood coagulation factor acting in the intrinsic pathway. Its activated form, ixa, forms a complex with factor viii and calcium on platelet factor 3 to activate factor x to xa. Deficiency of factor ix results in christmas disease (haemophilia b). Chemical name: Blood-coagulation factor IX (12 Dec 1998) |
| heparin cofactor II | <chemical> A sulfated plasma protein with the mw of approximately 66kda. The protein is an inhibitor of thrombin in plasma that is activated by dermatan sulfate or heparin. It is a member of the serpin superfamily. Pharmacological action: serine proteinase inhibitors. Chemical name: Heparin cofactor II (12 Dec 1998) |