THE RHD- TRAIT IN A WHITE PATIENT WITH THE RHCCEE PHENOTYPE ATTRIBUTED TO A FOUR-NUCLEOTIDE DELETION IN THE RHD GENE

To the Editor: The Rh blood group locus comprises two closely linked genes, designated RHCE and RHD, encoding integral membrane proteins that carry the Cc/Ee and D antigens, respectively. The D− phenotype is usually due to the complete deletion of the RHD gene from the Rh locus.[1][1] The D