The Rare Phenotype En(a‐) in a French‐Canadian Family

Abstract
A French‐Canadian En(a‐) propositus, whose red cells are phenotypically like the three previously reported, differs in the mode of reaction of this antibody which is apparently not immune. His consanguineous parents and 2 of this 4 sibs are heterozygous EnaEn, the other 2 being EnaEna. Sialic acid levels and the MN glycoprotein content of the red cells of the family and the PAS‐stained patterns of the red cell membranes of the propositus confirm the serological findings.