epimer
Pronunciation: ep′i-mĕr
Definition: One of two molecules (having more than one chiral center) differing only in the spatial arrangement about a single chiral atom, α-d-glucose and α-d-galactose (with respect to carbon-4).
[epi- + G. meros, part]
See Also: sugars
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Examples: glitazone, GI cocktail, etc.

