Hi jleibler!
I have been studying this particular mechanism myself and have even
better than a diagram of this process: a movie. This is a videotaped
lecture with very good diagrams from my neuroscience class at JHU:
[ http://mfile.akamai.com/7111/mov/www.mb.jhu.edu/media/ghosh.h.mov ]
The entire movie is about neural development and differentiation,
however some specific sections are most applicable to your question.
Specifically, look at the times from about 9 minutes to about 15
minutes into the video (or, if you don't have a time counter on your
video player, the section about 1/3 through the entire video). This
is a large video file, so please give it time to buffer correctly, and
it should run smoothly.
You will need Quicktime to watch this video. You can download
Quicktime here:
[ http://www.apple.com/quicktime/products/qt/ ]
It is fairly detailed, and also describes the process by which this
mechanism of differentiation is controlled.
In addition to the above video, I found a simple diagram of this
process at:
[ http://www.elis.sk/bll/00/full/bll0800h.pdf ]
If you don't have it, you will need to dowload the free Adobe Acrobat
Reader in order to view this .pdf file. You can get the free Adobe
Acrobat Reader from:
[ http://www.adobe.com/products/acrobat/readstep2.html ]
Yes, the bulk of this document is in some non-English language,
however the diagram and it's caption are in English.
Another good diagram of this process can be found at:
[ http://www.cellbio.wustl.edu/faculty/huettner/Temple01.pdf ]
on page 2.
The previously-mentioned video, however, is by far the best
diagram/explanation of this process that I've found. I hope these
resources satisfy your needs; please let me know if there are any
clarifications necessary or other questions.
Sincerely,
Andrewxmp |
