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. 2011 Sep 8;6(9):e24152. doi: 10.1371/journal.pone.0024152

Figure 9. Smad expression patterns.

Figure 9

mRNA expression of Mnemiopsis Smad genes during development. All views are lateral, unless otherwise specified. The asterisk marks the position of the blastopore or mouth. (A) MlSmad6, the I-Smad, is expressed in mesodermal derivatives of the tentacle bulb, as well as in the apical organ. (B) MlSmad4, the Co-Smad, is expressed in a discrete domain of the pharynx at the ectoderm-endoderm boundary. There is also late expression in the apical organ in four spots. (C) MlSmad1a, an R-Smad, is expressed in parts of the tentacle bulb and apical organ. (D) MlSmad2, another R-Smad, is expressed ubiquitously from egg to cydippid.