aldehydo-D-ribose 5-phosphate + D-glyceraldehyde 3-phosphate + NH4(+) => pyridoxal 5'-phosphate + phosphate + 4 H2O + H(+)
aldehydo-d-ribose 5-phosphate + d-glyceraldehyde 3-phosphate + nh4(+) => pyridoxal 5'-phosphate + phosphate + 4 h2o + h(+)