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.
If your light buckets are in good shape, you can save a few bucks and replace the arms only. Model A 1930-31 Cowl Light Arms A-13322/23 (1930-1931) $105.00 / pr. If your buckets are in good shape, you can save a few bucks and replace the arms only. Model A Cowl Lamp Marking Tool A-13300-X (1930-1931) $3.25 / ea.