The human p80HT coding sequence was amplified by PCR, using a human fetus Marathon-ready cDNA library (Clontech) as the template and specific primers based on the published p80HT sequence (GenBank U09609), and cloned into pHSE3', a vector containing an H-2Kb promoter and an immunoglobulin mu chain enhancer for transgene expression in lymphocytes. Line 808 was generated. (J:123872)