title: Alpha-galactosyltransferase activity in the serum of frogs (Rana catesbeiana).
abstract: Human blood group 0 cells were converted into B-active cells by incubation with uridine diphosphate D-galactose and unfractionated serum from bull frog (Rana catesbeiana). Under these conditions, "Bombay" (Oh) type red cells were not converted, and group 0 foetal cells possessing a few H antigenic sites were only weakly converted into B-active cells. In addition, the agglutination titer of the converted cells with anti-H serum decreased. These results therefore indicate that the conversion depends upon the presence of H-substance on the red cells. It was concluded from the results of this investigation that the blood group B specific alpha-galactosyltransferase was present in the serum of Rana catesbeiana as well as in the human group B serum.
mesh_terms: D000017:ABO Blood-Group System; D000818:Animals; D004912:Erythrocytes / Q000276:immunology; D005700:Galactosyltransferases / Q000378:metabolism*; D006801:Humans; D011892:Rana catesbeiana / Q000276:immunology*
chemical_list: D000017:ABO Blood-Group System; D005700:Galactosyltransferases