PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12146976-2 2002 When the tetrapyrrole is inactivated by phototransforming it with ultraviolet light prior to the first division, the embryo fails to synthesize dorsal mRNAs, such as goosecoid or chordin, yet forms increased amounts of ventral transcripts, such as Vent 1, and, consequently, develops ventralized morphology. Tetrapyrroles 9-21 chordin, gene 1 S homeolog Xenopus laevis 179-186