| lactalbumin | <protein> Milk protein fraction containing _ lactoglobulin and _ lactalbumin. _ lactalbumin is the regulatory subunit of lactose synthetase: thought to be related to lysozyme C. (18 Nov 1997) |
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| lactam | <chemistry> One of a series of anhydrides of an amido type, analogous to the lactones, as oxindol. Origin: Lactone + amido. Source: Websters Dictionary (01 Mar 1998) |
| lactamic | <chemistry> Pertaining to, or designating, an amido acid related to lactic acid, and Synonym: amido-propionic acid. Source: Websters Dictionary (01 Mar 1998) |
| lactamide | <chemistry> An acid amide derived from lactic acid, and obtained as a white crystalline substance having a neutral reaction. It is metameric with alanine. Origin: Lactic + amide. Source: Websters Dictionary (01 Mar 1998) |
| lactams | <chemical> Cyclic amides formed from aminocarboxy acids by the elimination of water. They are isomeric with lactims, which are enol forms of lactams. Pharmacological action: antibiotics, lactam. (12 Dec 1998) |
| lactary | Milky; full of white juice like milk. "Lactary or milky plants." Origin: l. Lactarius, fr. Lac, lactis, milk: cf. F. Lactaire. Source: Websters Dictionary (01 Mar 1998) |
| lactase | Enzyme that breaks down the milk sugar lactose. (12 Dec 1998) |
| lactase deficiency | An intolerance to milk and dairy products due to a deficiency of lactase in the intestine. Lactase is a enzyme which breaks down milk sugar or lactose. This condition is common in adults and may affect as many as 70-90% of Asians, African Americans, Native Americans and Mediterranean populations. This condition may also develop as the result of an intestinal disease such as celiac sprue. Symptoms include abdominal cramps, bloating, nausea, weight loss and diarrhoea. Treatment involves removing milk products from the diet. For infant's see Lactofree or ProSobee. (27 Sep 1997) |
| lactase restriction | An inherited trait in which there is low lactase activity and thus there is defective lactose intestinal metabolism. Compare: lactase persistence. (05 Mar 2000) |
| lactate | Important as the terminal product of anaerobic glycolysis. Accumulation of lactate in tissues is responsible for the so called oxygen debt. (18 Nov 1997) |
| lactate 2-mono-oxygenase | A flavoprotein oxidoreductase catalyzing oxidation (with O2) of l-lactate to acetate plus CO2 and water. Synonym: lactic acid oxidative decarboxylase. (05 Mar 2000) |
| lactate dehydratase | <enzyme> From cell extracts of clostridium propionicum; catalyses the dehydration of (r)-lactate to acrylate Registry number: EC 4.2.1.54 Synonym: lactyl CoA dehydratase, lactyl coenzyme a dehydratase, lactoyl-CoA dehydratase (26 Jun 1999) |
| lactate dehydrogenase | <enzyme> An enzyme with 5 forms: LDH-1 is in the heart, its blood level can rise when heart muscle is damaged. Other forms can be found in the liver, brain, kidney, skeletal muscle and bone. A useful blood test in the evaluation of many disease processes, including heart attack, liver disease, muscular dystrophy and bone disease. (27 Sep 1997) |
| lactate dehydrogenase isoenzymes | <enzyme> Registry number: EC 1.1.1.- (12 Dec 1998) |
| lactate dehydrogenase virus | 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) |