title: Ecdysteroids and embryonic development in the shore crab, Carcinus maenas.
abstract: Eggs at various stages of embryonic development of Carcinus maenas contain high concentrations of the ecdysteroid ponasterone A together with lower titres of 20-hydroxyecdysone and ecdysone. Correlative studies on ecdysteroid titres and developmental characteristics of Carcinus embryos indicate that one function of ponasterone A might be related to the control of deposition of an embryonic envelope.
mesh_terms: D000818:Animals; D003386:Brachyura; D004440:Ecdysone / Q000032:analysis*; D004441:Ecdysterone / Q000031:analogs & derivatives* / Q000032:analysis*; D004625:Embryo, Nonmammalian / Q000502:physiology*; D005260:Female; D010063:Ovum / Q000502:physiology*; D011863:Radioimmunoassay
chemical_list: D004440:Ecdysone; D004441:Ecdysterone; C008999:ponasterone A