Recently, we and others have cloned cDNAs encoding a second member of the Csk family of inhibitory protein kinases, which we termed Bhk [M.A. Ershler et al. (1994) Dokl. Akad. Nauk. 339, 679–683]. In the present study, two new distinct types of bhk mRNA were found in addition to the third form described previously. Analysis of the bhk genomic structure established that three exons participate in the alternative splicing of bhk mRNA.
