2-oxoglutarate + AH2 => (R)-2-hydroxyglutarate + A
2-oxoglutarate + ah2 => (r)-2-hydroxyglutarate + a
2-oxoglutarate + AH2 => (R)-2-hydroxyglutarate + A
2-oxoglutarate + ah2 => (r)-2-hydroxyglutarate + a