The jelly canal marker of polarity for sea urchin oocytes, eggs, and embryos.
D000818:Animals; D004625:Embryo, Nonmammalian / Q000166:cytology; D005260:Female; D009865:Oocytes / Q000166:cytology*; D010063:Ovum / Q000166:cytology*; D012617:Sea Urchins / Q000166:cytology* / Q000196:embryology