01 July 2008
Vol 1, Issue 26

About The Cover

Cover image expansion

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]