2,4-diacetamido-2,4,6-trideoxy-alpha-D-mannopyranose + phosphoenolpyruvate + H2O <=> N,N-diacetyllegionaminate + phosphate
2,4-diacetamido-2,4,6-trideoxy-alpha-d-mannopyranose + phosphoenolpyruvate + h2o <=> n,n-diacetyllegionaminate + phosphate