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Fig. 1. Expression of DHCR7 in developing notochord. (Top)
Hierarchical clustering analysis of microarray data. Each column represents a
single hybridization and each row a single clone. The colors ranging from red
to green correspond to increased and decreased gene expression. LPM, left
presomitic mesoderm; NTC, notochord; RPM, right presomitic mesoderm.
(Bottom) Whole-mount in situ hybridization revealing the expression of
DHCR7 in the midline of a Xenopus neurula stage embryo.