NCIt definition : The R-enantiomer of alpha-hydroxyglutarate (2-HG) where the hydroxy group is attached
to the right side of the asymmetric carbon furthest from the carbonyl. This isoform
is the predominant form found in gliomas associated with the expression of isocitrate
dehydrogenase (IDH) mutants. Therefore, measurement of the expression of the R-form
may be correlated more closely with those diseases than measurement of total 2-HG.;