Homozygous D

Abstract
A homozygote for the Rh complex D associated with the rare Evans antigen was identified and her family tested: D / D can be clearly distinguished serologically from ‐D‐I‐D‐. The immune antibody in the serum of the propositus reacts with all cells tested except homozygous ‐D‐, CwD‐, cD‐ and Rhnull cells.