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passages.type: sentence
passages.text: However, the 131-1-1 chimera containing the Na region of Smad1 could weakly induce transcription of 3GC2-Lux, but the 13-1-1 and 133-1-1 chimeras failed to do so,2 suggesting that Smad1 may bind to GC-rich sequences in a fashion different from that of Smad3 and that both the Na and the C regions of MH1 may play a role in the direct DNA binding of Smad1.
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