Larger Image pde9a gene expression in Xenopus laevis embryo via in situ hybridization, NF stage 28, lateral view, anterior left. Image copyrighted by Pollet, Nicolas Copyright © CNRS UMR 8080, Nicolas Pollet Image published in: AXELDB Database, AxelDB (Image Pages) Gene Synonyms Species Stage(s) Tissue pde9a.S X. laevis Throughout NF stage 29 and 30 cloaca ectoderm epidermis fin ciliated epidermal cell Image source: Large scale screen Permanent Image Page Printer Friendly View XB-IMG-30192