Research roles of retinoic acid and... For example, engrailed is expressed in the posterior portion of each of the anterior somites of amphioxus and in the posterior wall of the mandibular head cavity and upper lip in the lamprey [5,6] as well as in the man-dibular mesoderm of sharks [7] and the jaw muscles of the zebrafish [8]....
Precibarial valve of philaenus spumarius.(A) SEM image of the epipharynx at the level of the precibarial valve showing the rigid ring (Rin) from which the bell-like invagination folds up in the head cavity, the cuticular flap (Flp) and the basin-like structure (Bls)....
Expression of amphigli during amphioxus embryonic and early larval development.... Embryo at the end of neurulation stained for AmphiGli, with expression visible in dorsal mesoderm, neural plate and left head cavity (hc)....
Deficiency of autotaxin/lysophospholipase d results in head cavity formation in mouse embryos through the lpa receptor-rho-rock pathway... Moreover, Enpp2−/− embryos show growth retardation, allantois malformation, no axial turning, and head cavity formation....
