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Fig. 5. Lateral plate mesoderm does not contribute to SMCs in the anterior and
middle part of the descending aorta in adult mice. (A-F) Adult
descending aorta from Hoxb6-cre/R26 reporter mice was stained for
lacZ activity at different anterior-posterior levels (levels are
indicated in A). lacZ staining was restricted to endothelial cells in
the anterior and middle part of the vessel (B-D). In posterior parts of the
vessel, expression was frequently found in SMCs and endothelial cells (E,F).
Boxed areas in B,C show lacZ-expressing endothelial cells at higher
magnification to confirm successful staining. Arrows, SMC; arrowheads,
endothelial cells; al, aortic lumen; ra, renal artery; ia, iliac artery; m,
media. Scale bars: 25 µm.