D-arabinose 5-phosphate + phosphoenolpyruvate + H2O => 3-deoxy-alpha-D-manno-2-octulosonate-8-phosphate + phosphate
d-arabinose 5-phosphate + phosphoenolpyruvate + h2o => 3-deoxy-alpha-d-manno-2-octulosonate-8-phosphate + phosphate