title: Temporal-spatial expression of two Paracentrotus lividus cell surface proteins.
abstract: The temporal expression of two cell surface proteins, called BEP1 and BEP4, during Paracentrosus lividus embryonic development was studied. These proteins are found in both monomeric and dimeric forms in egg and embryos and we have established that their specific form is related to their being in the cytoplasm or on the cell surface. The spatial distribution of BEP1 and BEP4 proteins in eggs and embryos was established by whole mount immunohistochemistry. These proteins are located in the animal part of unfertilized and fertilized eggs; thereafter they are much less represented in structures derived from the vegetal cells of the embryo such as the micromeres of the 16 cell stage, the primary mesenchyme of blastula and the gut of gastrula. At the prism stage BEP1 and BEP4 proteins are present to some ectodermal parts and thereafter, at the pluteus stage, to the oral region.
authors: Istituto di Biologia dello Sviluppo C.N.R. via Ugo La Malfa 153, Palermo, 90146, Italy.
authors: D P
authors: DP
authors: Romancino
authors: G
authors: G
authors: Ghersi
authors: R
authors: R
authors: Gambino
authors: G
authors: G
authors: Montana
authors: C
authors: C
authors: Costa
authors: M
authors: M
authors: Di Carlo
mesh_terms: D000818:Animals; D015153:Blotting, Western; D015151:Immunoblotting; D007150:Immunohistochemistry; D008565:Membrane Proteins / Q000378:metabolism*; D011233:Precipitin Tests; D011993:Recombinant Fusion Proteins; D012617:Sea Urchins / Q000196:embryology* / Q000378:metabolism*; D013997:Time Factors; D014018:Tissue Distribution
chemical_list: C065555:Bep4 protein, Paracentrotus lividus; D008565:Membrane Proteins; D011993:Recombinant Fusion Proteins; C065554:bep1 protein, Paracentrotus lividus