Studies on the blood of an MiV homozygote

Abstract

An individual, whose parents are 3rd cousins, was homozygous for the rare Mi.V. condition. The proposita''s red blood cells type as M-, N+(weak), S-, s+(strong), U+, Mi(a-), Vw-, Hil+; Wr(a-b-). The cells react, albeit less strongly than most other samples, with anti-Ena. From studies on the red blood cells of the proposita and on those of another persons of the En(a+), Wr(a-b-) phenotype, it is apparent that the term anti-Ena actually describes a number of antibodies of differing specificities. Inhibition studies with sialoglycoprotein (SGP) isolates, and tests on protease-modified red blood cells illustrate some of the differences in specificity. Biochemical analyses of the SGP of the red blood cells of the MiV homozygote and those of her parents confirm that the Mi.V condition is associated with the absence of normal MN SGP (.alpha.) and normal Ss SGP (.delta.) the appearance of a hybrid SGP molecule comprised of a portion of the MN SGP at its NH2 terminal end, and a portion of the Ss SGP at its C terminal end.