| |
Figure B. Xtwi Is Expressed in the Mesoderm
and Neural Crest of Late ·Neurulae
transcripts (Figure 48). Apart from the neural crest, the
only tissues labeled by Xtwi at these early stages are of
mesodermal origin. It might be thought that a low level of
(A) and (B) are sections a quarter of the way, (C)
and (D) a third of the way, and (E) and (F) about
halfway through stege 18-19 embryos counting
from the anterior end, hybridized with Xtwi
and cardiac actin probes. Note the strong expression
of Xtwi in the an1erior neural crest
(nc). Mesodermal labeling by Xtwi is restricted
to the notochord (n) and anterior lateral plate
mesoderm (lp), whereas cardiac actin labels
only the somites (s). |
