Lugar de publicación Ric-8A, a guanine nucleotide exchange factor for heterotrimeric G proteins, is critical for cranial neural crest cell migration. 378:74-82. 2013 Syndecan-1 regulates BMP signaling and dorso-ventral patterning of the ectoderm during early Xenopus development. 329(2):338-349. 2009