spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

Right arrow Help viewing high resolution images
Right arrow Return to article
(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 6


Fig. 6. The signal from the neural tube is a soluble factor. Internal views of Paraxis-RMO270 stained, bisected embryo at HH20. (A,D) Unoperated control sides, (B,C,E,F) operated sides before (B,E) and after (C,F) removal of the barrier or filter. Anterior is to the top, dorsal to the left in A,D; to the right in B,C,E,F. Position of the barrier or filter is indicated. (A-C) Separation of neural tube and head mesoderm with tantalum foil, an impermeable barrier. Note that on the control side the abducens nerve is well fasciculated and innervated the Paraxis-expressing lateral rectus anlage (A). On the operated side (B,C), the nerve is defasciculated and did not reach the area that normally would express Paraxis next to rhombomere 2. (D,E) Separation of neural tube and head mesoderm with a polycarbonate filter that admits soluble factors. Note that Paraxis is expressed on the operated side. Moreover, the abducens nerve navigated around the filter and innervated the Paraxis-expressing lateral rectus. Scale bar: 200 µm. r, rhombomere; VI, abducens nerve.





Right arrow Return to article