In biology, the active site is the region of an enzyme where substrate molecules bind and undergo a chemical reaction. The active site consists of residues that form temporary bonds with the substrate (binding site) and residues that catalyse a reaction of that substrate (catalytic site).
Seattle is rolling out 11 rainbow crosswalks in Capitol Hill this week, adding a colorful bang to the annual Pride celebration. The crosswalks cost the city $66,000, said Seattle Department of Transportation spokesman Rick Sheridan, and are permanent.
Rainbow Glass in Sacramento, has 40-50 stained-glass panel-style windows hanging in their shop from prices between $175 and $1,750, and a large selection of lampshades, blown glass items, kiln-formed items, you name it. They also have supplies for the do-it-yourself-er, and class to teach you how.