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Autoregulation of Siamois transcription. (A) Induction of −833pSia-Luc by Siamois mRNA in ventral animal blastomeres. (B and C) The effect of SE mRNA on activity of −296, −245, and −179pSia-Luc constructs (B) and −135pSia-Luc (C) in dorsovegetal blastomeres.
