Main Page | See live article | Alphabetical index Sonic hedgehog (shh) is one of three proteins in the hedgehog family, the others being desert hedgehog (dhh) and indian hedgehog (ihh). External link An introductory article on shh For information on the Sega game, see Sonic the Hedgehog. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.