using a combined indirect immunoperoxidase ( pap ) /direct immunofluorescence ( if ) staining technique , pregnancy associated alpha 2-glycoprotein ( alpha 2-pag ) has been shown to be present solely in the iga producing plasma cells . alpha 2-pag was undetectable in plasma cells synthesizing any of the other immunoglobulin isotypes ( igg , igm , igd and ige ) .
C0021017
immunoglobulin
C0020843
igd