The primitive streak and cellular principles of building an amniote body through gastrulation

  title={The primitive streak and cellular principles of building an amniote body through gastrulation},
  author={Guojun Sheng and Alfonso Martinez Arias and Ann Sutherland},
Description The nonconserved primitive streak In human development, a linear structure called the primitive streak appears 14 days after fertilization. This structure marks the transition of the embryo from having radial to bilateral symmetry. The primitive streak also gives anterior-posterior and dorsal-ventral spatial information to cells undergoing gastrulation and forming the various body cell types. In a Review, Sheng et al. present a phylogenetic and ontogenetic overview of the primitive… 
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