Fig. 2From: PfSMAD4 plays a role in biomineralization and can transduce bone morphogenetic protein-2 signals in the pearl oyster Pinctada fucata Expression of PfSMAD4 mRNA in various tissues (a) and at the developmental stages of Pinctada fucata (b). The mRNA levels were quantified by qPCR. The results are expressed as fold-change. Each bar represents the mean ± S.E.M (n = 3)Back to article page