Expression of creb3l2 during zebrafish development. (A) RT-PCR analysis of creb3l2 expression with beta-actin as a loading control. (B-E′) Whole mount in situ hybridization of creb3l2 expression. Arrows indicate increased expression at the developing pharyngeal skeleton and fin between 36 and 60 hpf. C-E, lateral views, D′,E′ ventral views of D,E. Abbreviations: e, ethmoid plate; m, Meckel′s cartilage; ch, ceratohyal; oc, otic capsule.