A NEW VARIANT IN ABO BLOOD GROUP SYSTEM - BH

Summary. The authors describe an assumed but hitherto undiscovered variant of incomplete ‘Bombay’ phenotype, designated as Bh, with partial suppression of the B antigen. The erythrocytes contain a very weak B antigen, at quantitative level B20; they are H‐negative and Lea‐positive. The serum contains anti‐A, anti‐B and anti‐H antibodies. The patient is a secretor of Lea and a non‐secretor of ABH. The quantitative and immunogenetic properties of the variant are discussed. It is supposed that the variant is the effect of the gene combinations Hxh, or HxHx at the Hh locus. We wish to thank the physicians attending the patient K. M., Dr. V. Kluge from Tatranská Kotlina and Dr. L. Dráč; from Vel'ký. Šariš for assistance in obtaining the necessary blood samples. © 1969 Blackwell Publishing Ltd