4.2.3.2 ethanolamine phosphate + H2O = acetaldehyde + NH3 + phosphate A pyridoxal-phosphate protein. - 4.2.3.2 ethanolamine phosphate + H2O = acetaldehyde + NH3 + phosphate a pyridoxal-phosphate protein. Also acts on D(or L)-1-aminopropan-2-ol O-phosphate -