This transgene contains the following elements: the mouse histocompatibility 2 K region (H2-Kb) promoter, a hybrid intron (AML virus 3' end of 5' UTR exon and 5' end of intron 1 plus Igh-V splice acceptor), the human fucosyltransferase 1 (H blood group) cDNA and SV40 late poly(A) signal sequences. (J:307477)