to evaluate further the feasibility of hla typing for prenatal diagnosis , we tested human amniotic fluid cells ( afc ) , known to express hla-a , -b , and -c antigens , for the presence of hla-dr antigens using type-specific antisera in the microcytotoxicity assay and a monoclonal antibody directed against the common hla-dr structure ( cdr ) in indirect immunofluorescence .
C0086418
human
C0019764
hla-dr