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.
Price: Priced at about $400-$600, Goldâs Gym entry level treadmills cost less than most of the competition. The brand also includes models priced up to $1,500. Extra exercise: The Goldâs Gym CrossWalk 570 Treadmill comes with resistance training for the upper body. With CrossWalk Upper-Body Arms, walkers can tone their arms and burn up to 50% more calories.