Phospho-PKD1/2/3/PKC mu (Ser738/S742) Antibody detects endogenous levels of PKD1/2/3/PKC mu only when phosphorylated at Serine 738/Sine 742. PKD3 a CAMK kinase of the PKD family. An important component of signaling pathways downstream from novel PKC enzymes after B-cell receptor engagement.