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.
RAW: The cost of rainbow crosswalks 2:12. (Note: CBC does not endorse and is not responsible for the content of external links.) The City of Vancouver has created some new rainbow crosswalks in the downtown's West End to mark the launch of Pride Week, the annual celebration of the city's gay, lesbian, bisexual, transgendered and queer communities.