... region of the variantlacked the transactivation domain and the tyrosine res-idue (Tyr694) phosphorylated by Janus protein tyro-sine kinase or other tyrosine kinases, although the DNA-binding ... splicing variant of STAT5A,STAT5A_DE18, from a cDNA library of the mousebrainstem. The variant protein was generated by aframeshift in the C-terminal region, resulting in dele-tion of the ... consists of 52 bp, similar to the case for mouse STAT5A. Therefore, we examinedwhether the splicing variant was expressed in the human brainstem. To minimize the amplification of STAT5B, the analysis...