Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.


Cover Figure

COVER This week's issue features a Perspective that discusses the role of Sonic hedgehog (Shh) in promoting the proliferation of mesenchymal cells that give rise to digits in the developing limb. The image shows the anterior and posterior digits that form in the chick limb. [Image: Craig Nicol, MRC Human Genetics Unit, Western General Hospital, Edinburgh, UK]

[Table of Contents]

To Advertise     Find Products

Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882