Gene clusters in the blood group system B of cattle

Abstract
The linear order of genetic determinants for the blood group system B in cattle was further studied. Two groups of antigenic specificities.sbd.inclusion groups.sbd.showing serologic relationship are described. Recombination frequencies suggest that these specificities are controlled by 2 clusters of genetic determinants. The structures of these inclusion groups and clusters are compared with those of antigenic complexes in other species, especially in mice. Similarities and dissimilarities between the blood group system B of cattle and the H-2 system in mice are described.