Warning: Undefined variable $zfal in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 525
Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 525
Warning: Undefined variable $sterm in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 530
Warning: Undefined variable $sterm in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 531
 
English Wikipedia
Nephropedia Template TP (
Twit Text
DeepDyve
Pubget Overpricing |  
lüll
Gastrulation and homeobox genes in chick embryos Lemaire L; Kessel MMech Dev 1997[Sep]; 67 (1): 3-16We review the early stages of chick embryogenesis, in particular the formation of the hypoblast, and the ingression of endoderm and mesoderm through the primitive streak. The formation of a trilaminar embryo during gastrulation is accompanied by the specification of body axes. The first axis is already present in the unfertilized egg and runs from the cytoplasmatic animal to the yolk rich vegetal pole. Already within the uterus a second axis conveys bilateral symmetry to the embryo. It extends from a dorsal/anterior to a ventral/posterior position. These axial poles segregate during gastrulation to form the classical coordinates, a dorsal-ventral and an anterior-posterior axis. The establishment of axes is accompanied by the expression of specific combinations of homeobox genes during gastrulation in the chick, as in other metazoa. We review the avian specific information and compare it with findings in other species. A combinatorial homeobox code for the specification of identities during development is discussed.|*Avian Proteins[MESH]|*Genes, Homeobox[MESH]|Animals[MESH]|Body Patterning/genetics[MESH]|Chick Embryo/*physiology[MESH]|Endoderm[MESH]|Gastrula/*physiology[MESH]|Gene Expression Regulation, Developmental[MESH]|Homeodomain Proteins/genetics[MESH]|Mesoderm[MESH]|Nerve Tissue Proteins/genetics[MESH]|Otx Transcription Factors[MESH]|Trans-Activators/genetics[MESH]|Transcription Factors/genetics[MESH] |
