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lactase
lactase The enzyme that metabolizes lactose. It is present in the stomach of neonatal mammals, but usually ceases to be secreted after weaning, hence milk is indigestible to most mammalian species after this time. In humans, it is a polymorphism: lactase is secreted throughout life in most people of north European and north Indian origin, but its frequency declines towards the tropics and most tropical, East Asian, Australian Aboriginal, Pacific, and Native American peoples cannot digest milk.
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MICHAEL ALLABY. "lactase." A Dictionary of Zoology. 1999. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "lactase." A Dictionary of Zoology. 1999. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O8-lactase.html MICHAEL ALLABY. "lactase." A Dictionary of Zoology. 1999. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-lactase.html |
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lactase
lactase (β-galactosidase) The enzyme that breaks down the milk sugar, lactose, to glucose and galactose by catalysing the hydrolysis of galactose residues.
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"lactase." A Dictionary of Biology. 2004. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "lactase." A Dictionary of Biology. 2004. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O6-lactase.html "lactase." A Dictionary of Biology. 2004. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-lactase.html |
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lactase
lactase (lak-tayz) n. an enzyme, secreted by the glands of the small intestine, that converts lactose (milk sugar) into glucose and galactose during digestion.
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"lactase." A Dictionary of Nursing. 2008. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "lactase." A Dictionary of Nursing. 2008. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O62-lactase.html "lactase." A Dictionary of Nursing. 2008. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-lactase.html |
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lactase
lactase The enzyme that hydrolyses lactose to glucose and galactose in the brush border of intestinal mucosal cells. See also disaccharide intolerance.
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Cite this article
DAVID A. BENDER. "lactase." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. DAVID A. BENDER. "lactase." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O39-lactase.html DAVID A. BENDER. "lactase." A Dictionary of Food and Nutrition. 2005. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O39-lactase.html |
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lactase
lactase •ablaze, amaze, appraise, baize, Blaise, blaze, braise, broderie anglaise, chaise, craze, daze, écossaise, erase, faze, gaze, glaze, graze, Hayes, Hays, haze, laze, liaise, lyonnaise, maize, malaise, Marseillaise, mayonnaise, Mays, maze, phase, phrase, polonaise, praise, prase, raise, raze, upraise
•nowadays • polyphase • multiphase
•stargaze • amylase • periclase
•underglaze • manes • lipase
•catchphrase
•conquistadores, mores, señores
•polymerase • paraphrase
•chrysoprase • lactase • equites
•Gervaise • endways • edgeways
•eques • breadthways • lengthways
•leastways • widthways • anyways
•sideways • longways • crossways
•always
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"lactase." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "lactase." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O233-lactase.html "lactase." Oxford Dictionary of Rhymes. 2007. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-lactase.html |
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