Auxotrophy (Gr. αὐξάνω `to increase`; τροφή `nourishment`) is the inability of an organism to synthesize a particular organic compound required for its growth (as defined by IUPAC). An auxotroph is an organism that displays this characteristic; auxotrophic is the corresponding adjective. Auxotrophy is the opposite of prototrophy, w...
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http://en.wikipedia.org/wiki/Auxotrophy
Inability of a micro-organism to synthesize a particular organic compound required for its growth.
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http://sis.nlm.nih.gov/enviro/iupacglossary/glossarya.html
auxotrophy Requiring a specific growth substance beyond the minimum required for normal metabolism and reproduction by the parental or wild-type strain; such as, auxotrophic mutants of bacteria.
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http://www.wordinfo.info/words/index/info/view_unit/2191/2
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