Citation
Barr, S., Jackson, D., Sasai, Y., Lu, B., De Robertis, E., Ferguson, E., Hoffmann, F.M. (1995). sog and chordin encode homologous secreted polypeptides that act in dorsal-ventral patterning in Drosophila and Xenopus. A. Dros. Res. Conf. 36 : 338B.