| LD | <abbreviation> Lethal dose. (05 Mar 2000) |
|---|---|
| LDH | <enzyme> The enzyme that catalyses the formation and removal of lactate according to the equation: pyruvate + NADH = lactate NAD. <cell culture> The appearance of lactic dehydrogenase in the medium is often usedas an indication of cell death and the release of cytoplasmic constituents. Acronym: LDH (25 Jun 1999) |
| LDH agent | A species of RNA virus, probably an arterivirus, occurring in a number of transplantable mouse tumours. Infected mice have permanently elevated serum levels of lactate dehydrogenase. (12 Dec 1998) |
| LDL | <biochemistry> A lipoprotein substances (combination of a fat and a protein) which acts as a carrier for cholesterol and fats in the bloodstream. High levels of low density lipoprotein are considered a positive risk factor for the development of coronary artery disease. Less than 130 mg/dl is desirable, 130 to 159 mg/dl is borderline high, over 160 is considered high. Acronym: LDL (10 Jan 1998) |
| ldl cholesterol | Low-density lipoprotein cholesterol (the bad cholesterol). (12 Dec 1998) |
| LDL receptor disorder | Abnormality in clearance of LDL from the plasma due to abnormality in LDL receptor activity; causes hypercholesterolaemia. (05 Mar 2000) |