- Cloning, embryonic expression, and functional characterization of two novel connexins from Xenopus laevis. de Boer, T.P., Kok, B., Roël, G., van Veen, T.A., Destrée, O.H., Rook, M.B., Vos, M.A., de Bakker, J.M., van der Heyden, M.A. Biochem. Biophys. Res. Commun. (2006)