tokens: We now show that RNU2 fragility can be induced by transfection with an expression vector encoding Ad12 E1B 55 kDa alone but not by an E1 vector encoding all E1 products ( 3 E1A proteins , as well as the E1B 19 kDa and 55 kDa proteins ) .
folded_tokens: we now show that rnu2 fragility can be induce by transfection with a expression vector encode ad12 e1b 55 kda alone but not by a e1 vector encode all e1 product ( 3 e1a protein , as well as the e1b 19 kda and 55 kda protein ) .