Scientists uncover the intricacies of the 'on/off switch' that creates cell differentiation (image)

Caption
A. Drawing of the hb gene showing a Bicoid-bound enhancer and the hb promoter. B. A fly embryo showing hb RNA (blue) at only one end of the embryo. Image
Credit
Image courtesy of Jia Ling and Stephen Small
Usage Restrictions
Use in conjunction with this study only.