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. 2001 Feb 13;98(4):1665–1670. doi: 10.1073/pnas.98.4.1665

Figure 5.

Figure 5

Lamprey Dlx gene expression in the forebrain and pharyngeal arches. Whole mounts and horizontal sections of the head regions of 15-day-old lamprey embryos labeled with DlxA, DlxB, DlxC, and DlxD riboprobes. (A–D, ×150; E–K, ×75.) All four lamprey Dlx genes are expressed in each pharyngeal arch (A–D, arrows). Sections reveal that Dlx transcripts accumulate in the rostrolateral quadrant of the arch mesenchyme (F, G, I, and K, arrows), the site of future cartilage condensations. DlxA and DlxC are expressed in two bilateral pairs of transverse stripes in the ventral diencephalon and telencephalon (A, C, E, and H, arrowheads), whereas DlxD is expressed in a single pair of transverse stripes in the ventral diencephalon (D and J). DlxA, DlxB, and DlxC are also expressed in the olfactory placode (OlfP) and the otic vesicle (OtV, not shown for DlxC and DlxD). DlxB is not detected in the forebrain, olfactory placode, or otic vesicle.