Biochemistry

A Dictionary of Biology A Dictionary of Nursing A Dictionary of Food and... A Dictionary of British... Further reading

NAD

A Dictionary of Biology | 2004 | Copyright

NAD (nicotinamide adenine dinucleotide) A coenzyme, derived from the B vitamin nicotinic acid, that participates in many biological dehydrogenation reactions (see formula). NAD is characteristically loosely bound to the enzymes concerned. It normally carries a positive charge and can accept one hydrogen atom and two electrons to become the reduced form, NADH. NADH is generated during the oxidation of food, especially by the reactions of the Krebs cycle. It then gives up its two electrons (and single proton) to the electron transport chain, thereby reverting to NAD⁺ and generating three molecules of ATP per molecule of NADH.

NADP (nicotinamide adenine dinucleotide phosphate) differs from NAD only in possessing an additional phosphate group. It functions in the same way as NAD although anabolic reactions (see anabolism) generally use NADPH (reduced NADP) as a hydrogen donor rather than NADH. Enzymes tend to be specific for either NAD or NADP as coenzyme.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"NAD." A Dictionary of Biology. 2004. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"NAD." A Dictionary of Biology. 2004. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O6-NAD.html

"NAD." A Dictionary of Biology. 2004. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-NAD.html

Learn more about citation styles

NAD

A Dictionary of Nursing | 2008 | Copyright

NAD n. nicotinamide adenine dinucleotide: a coenzyme that acts as a hydrogen acceptor in oxidation-reduction reactions, particularly in the electron transport chain in cellular respiration. NAD and the closely related coenzyme NADP (nicotinamide adenine dinucleotide phosphate) are derived from nicotinic acid; they are reduced to NADH and NADPH, respectively.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"NAD." A Dictionary of Nursing. 2008. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"NAD." A Dictionary of Nursing. 2008. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O62-NAD.html

"NAD." A Dictionary of Nursing. 2008. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-NAD.html

Learn more about citation styles

NAD

A Dictionary of Food and Nutrition | 2005 | | Copyright

NAD, NADP Nicotinamide adenine dinucleotide and its phosphate, the coenzymes derived from niacin. Involved as hydrogen acceptors in a wide variety of oxidation and reduction reactions.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

DAVID A. BENDER. "NAD." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

DAVID A. BENDER. "NAD." A Dictionary of Food and Nutrition. 2005. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O39-NADNADP.html

DAVID A. BENDER. "NAD." A Dictionary of Food and Nutrition. 2005. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O39-NADNADP.html

Learn more about citation styles

Nad

A Dictionary of British Place-Names | 2003 | | Copyright

Nad (Nead an Iolair) Cork. ‘Eagle's nest’.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

A. D. MILLS. "Nad." A Dictionary of British Place-Names. 2003. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

A. D. MILLS. "Nad." A Dictionary of British Place-Names. 2003. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O40-Nad.html

A. D. MILLS. "Nad." A Dictionary of British Place-Names. 2003. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O40-Nad.html

Learn more about citation styles

NAD

A Dictionary of Plant Sciences | 1998 | | Copyright

NAD See NICOTINAMIDE ADENINE DINUCLEOTIDE.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

MICHAEL ALLABY. "NAD." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "NAD." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O7-NAD.html

MICHAEL ALLABY. "NAD." A Dictionary of Plant Sciences. 1998. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-NAD.html

Learn more about citation styles

NAD

A Dictionary of Zoology | 1999 | | Copyright

NAD See NICOTINAMIDE ADENINE DINUCLEOTIDE.

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

MICHAEL ALLABY. "NAD." A Dictionary of Zoology. 1999. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "NAD." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O8-NAD.html

MICHAEL ALLABY. "NAD." A Dictionary of Zoology. 1999. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-NAD.html

Learn more about citation styles

NAD

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

NAD see coenzyme .

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

"NAD." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

"NAD." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-X-NAD.html

"NAD." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-X-NAD.html

Learn more about citation styles

NAD

NAD (USA) National Academy of Design
• Biochem. nicotinamide adenine dinucleotide
• Med. no abnormality detected
• (or n.a.d.) no appreciable difference
• not on active duty

Cite this article
Pick a style below, and copy the text for your bibliography.

MLA
Chicago
APA

FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH. "NAD." The Oxford Dictionary of Abbreviations. 1998. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>.

FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH. "NAD." The Oxford Dictionary of Abbreviations. 1998. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O25-NAD.html

Learn more about citation styles

Free newspaper and magazine articles

	Is The NAD The Right Forum For You? Arguing Advertising Disputes Before The... News Wire article from: Mondaq Business Briefing; 3/13/2010
	NAD Reviews Social Media Endorsements.(National Advertising Division of the... News Wire article from: Mondaq Business Briefing; 12/16/2011
	Nine NAD case rulings worth remembering; Do you know the difference between... Magazine article from: Advertising Age; 3/7/2011