(R,S)-4-hydroxy-2-oxoglutarate aldolase activity
(r,s)-4-hydroxy-2-oxoglutarate aldolase activity
4-hydroxy-2-oxoglutarate glyoxylate-lyase (pyruvate-forming)
4-hydroxy-2-oxoglutarate glyoxylate-lyase (pyruvate-forming)