Sonic hedgehog (Shh) is a vertebrate homolog of the secreted segment-polarity gene, Hedgehog (Hh), which is produced by the embryonic notochord and floor plate. Genetic studies in human 1,2 and mouse ...
Maplewood, MN, June 20--Scotchgard is back. The familiar plaid aerosol can never really disappeared from the shelves. But Scotchgard's journey back to the market has been rocky, and the stain ...