2.6.1.54 4-aminobutanoate + 2-oxoglutarate about 8% of activity compared to pyridoxamine 5'-phosphate Clostridium butyricum 4-oxobutanoate + D-glutamate - ? 354481 2.6.1.54 pyridoxamine + 2-oxoglutarate about 25% of activity compared to pyridoxamine 5'-phosphate Clostridium butyricum pyridoxal + D-glutamate - ? 354480 2.6.1.54 pyridoxamine 5'-phosphate + 2-oxoglutarate - Clostridium butyricum pyridoxal 5'-phosphate + D-glutamate - r 354479