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(CURATORS NOTE:line drawings not shown due to poor reproduction quality- see original article for details)
Fig. 3. Xnot2 and Xbra are expressed
in distinct regions of the tailbud.
Embryos were hybridized with Xnot 2
(A,B,C) or Xbra (ABC antisense
RNA, developed with alkaline
phosphatase, embedded in paraffin
wax and sectioned. (A,A Stage 23,
sagittal section; (B,B stage 28,
sagittal section; (C, C stage 31,
frontal section. (A,B,C) Schematic
drawings indicating the anatomy of
the region based on analysis of serial
sections. Note that Xnot2 is expressed
in the chordoneural hinge (anterior
wall of the neurenteric canal) and
ventral spinal cord. Xbra, in addition
to the chordoneural hinge and
notochord, is expressed in the
posterior wall of the neurenteric canal
and in cells of the roof of the spinal
cord (arrowheads). Note that the
neurenteric canal is visible in the
frontal sections (C). |