Results 111 to 120 of about 3,673 (162)
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Paternal X chromosome expression in extraembryonic membranes of XO mice
Journal of Experimental Zoology, 1979AbstractThe paternally derived allelic form of the X chromosome linked enzyme phosphoglycerate kinase (PGK‐1) is expressed in both the fetus and extraembryonic membranes of 9.5 day post coitum XO (XPO) mouse conceptuses. Previous studies on trophectoderm and primitive endoderm derived extraembryonic membranes in XX conceptuses suggest expression of ...
Frels, W I, Chapman, V M
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Extraembryonic membrane development in a reproductively bimodal lizard, Lacerta (Zootoca) vivipara
Zoology, 2004Reproductive mode has been remarkably labile among squamate reptiles and the evolutionary transition from oviparity to viviparity commonly has been accompanied by a shift in the pattern of embryonic nutrition. Structural specializations for placental transfer of nutrients during intrauterine gestation are highly diverse and many features of the ...
Stewart, James R. +2 more
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Morphogenesis of extraembryonic membranes and placentation in Mabuya mabouya (Squamata, Scincidae)
Journal of Morphology, 2003AbstractTopological and histological analyses of Mabuya mabouya embryos at different developmental stages showed an extraembryonic membrane sequence as follows: a bilaminar omphalopleure and progressive mesodermal expansion around the whole yolk sac at gastrula stages; mesodermal split and formation of an exocoelom in the entire embryonic chamber at ...
Adriana, Jerez +1 more
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Formation of the Placenta and Extraembryonic Membranes
Annals of the New York Academy of Sciences, 1998ABSTRACT: In eutherian mammals, the first cell types that are specified during embryogenesis are committed to form extraembryonic (placenta and fetal membranes) rather than embryonic structures. The trophoblast cell lineage, for example, forms at the morula‐to‐blastocyst transition: cells at the periphery of the morula become trophoblast, whereas ...
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Establishment of a rat placental cell line expressing characteristics of extraembryonic membranes
Developmental Biology, 1987A cell line was derived from midgestation chorioallantoic placental explants of the outbred Holtzman rat. The cell line was found to express characteristics of extraembryonic membranes and to grow when introduced into allogeneic hosts. Growth in allogeneic hosts was detected following intraperitoneal injection of the cells but not following ...
M J, Soares +5 more
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Somatic polyploidy in extraembryonic membranes of the snake,Elaphe guttata
Protoplasma, 1993Video-densitometric DNA measurements of Feulgenstained tissues of 42 day old eggs of the corn snake,Elaphe g. guttata (Columbridae, Serpentes), revealed a basic DNA content of 2C=2.17 pg, with somatic polyploidy in the allantois, the chorioallontois, the yolk sac, and other extraembryonic membranes.
R. Meyer, W. Nagl
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Monotreme development with particular reference to the extraembryonic membranes
Journal of Experimental Zoology, 1993AbstractThis paper considers many of the salient features of monotreme development, particularly morphogenesis of the extraembryonic membranes.The uterine endometrium of both monotremes and marsupials exhibits a progesterone driven luteal phase where accelerated utilization of endometrial nutrients is evidenced by a rapid post‐primitive streak ...
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Expression of CD59, a Human Complement System Regulatory Protein, in Extraembryonic Membranes
International Archives of Allergy and Immunology, 1993CD59 (leukocyte cluster of differentiation antigen 59), is a phosphatidylinositol glycan-anchored membrane protein that inhibits lysis of cells by terminal complement system components. To further define complement regulatory proteins relevant to pregnancy, this study characterized the expression of CD59 in human extraembryonic membranes ...
O A, Vanderpuye +2 more
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Journal of Morphology, 2000
Oviposited eggs of Eumeces fasciatus contain embryos in the limb bud stage. Amniogenesis is complete and two yolk sac membranes, vascular trilaminar omphalopleure (choriovitelline membrane) and bilaminar omphalopleure, enclose the yolk vesicle. A small allantoic vesicle contacts the chorion.
Stewart, James R., Florian, James D.
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Oviposited eggs of Eumeces fasciatus contain embryos in the limb bud stage. Amniogenesis is complete and two yolk sac membranes, vascular trilaminar omphalopleure (choriovitelline membrane) and bilaminar omphalopleure, enclose the yolk vesicle. A small allantoic vesicle contacts the chorion.
Stewart, James R., Florian, James D.
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Molecular Reproduction and Development, 1997
A major secretory protein produced by bovine chorioallantoic membranes, in vitro, was previously identified as the carboxyl-propeptide of alpha-1 type III collagen. In the present study, the protein and gene expression of procollagen III by bovine chorioallantois between days 17 and 45 of pregnancy was investigated.
W, Shang, J J, Doré, J D, Godkin
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A major secretory protein produced by bovine chorioallantoic membranes, in vitro, was previously identified as the carboxyl-propeptide of alpha-1 type III collagen. In the present study, the protein and gene expression of procollagen III by bovine chorioallantois between days 17 and 45 of pregnancy was investigated.
W, Shang, J J, Doré, J D, Godkin
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