tokens: When the 73-bp fragment was fused to an alpha1-globin promoter-CAT construct and cotransfected with CCAAT transcription factor 1 ( CTF1 ) / NF1 into Drosophila Schneider SL2 insect cells ( which lack NF1 like proteins ) trans-activation of CAT activity was observed .
folded_tokens: when the 73-bp fragment be fuse to a alpha1-globin promoter-cat construct and cotransfect with ccaat transcription factor 1 ( ctf1 ) / nf1 into drosophilum schneider sl2 insect cell ( which lack nf1 like protein ) trans-activation of cat activity be observe .