smad2 and smad3 Are Required for Mesendoderm Induction by Transforming Growth Factor-β/Nodal Signals in Zebrafish

Shunji Jia, Zhen Ren, Xiang Li, Ying Zheng and Anming Meng

The Journal of Biological Chemistry 283 ( 4 ): 2418 - 2426 , 2008