tokens: The human T cell lymphotropic retrovirus type I ( HTLV-I ) trans-activator , Tax , interacts specifically with the basic-domain / leucine-zipper ( bZip ) protein , cAMP response element binding protein ( CREB ) , bound to the viral Tax responsive element consisting of three imperfect 21-base pair repeats , each with a cAMP response element core flanked by G / C rich sequences .
folded_tokens: the human t cell lymphotropic retrovirus type i ( htlv-i ) trans-activator , tax , interact specifically with the basic-domain / leucine-zipper ( bzip ) protein , camp response element binding protein ( creb ) , bind to the viral tax responsive element consist of three imperfect 21-base pair repeat , each with a camp response element core flank by g / c rich sequence .