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.
Depending on the size of the area and complexity of the design, a 10Ã15 area with varying sized boulders and complete ground coverage as shown would cost between $400-$600. Suggestions include: 1  River Rock 3Ã5â (Buffalo 3Ã5, Missouri Rainbow Oversize, or 4Ã8 cobblestones). 2  Moss, Granite, or Cobblestone boulders.