Learn more about enzyme active site and substrate specificity in the Boundless open textbook. Enzymes catalyze chemical reactions by lowering activation energy barriers and converting substrate molecules to products.
Diagram depicting antibiotic resistance through alteration of the antibiotic's target site, modeled after MRSA's resistance to penicillin. Beta-lactam antibiotics permanently inactivate PBP enzymes, which are essential for bacterial life, by permanently binding to their active sites. MRSA, however, expresses a PBP that does not allow the antibiotic into its active site.
Catalysts are of paramount importance to achieve high efficiency and economic profit for most heterogeneous reactions. Since catalytic reaction occurs only when reactants reach the active sites, these active sites must be .
This month, New York City will begin replacing thousands of pay phones with free Wi-Fi hot spots. The city expects to have 500 hot spots installed by July, and eventually about pay units will be replaced.
Made from natural wool: grey, off white and black… most of the natural materials are warm colour : brown_grey _white
Combined volcano plot for the ORR (up) and OER (below), resulting from the thermodynamic analysis shown in the main text. Only the most active metals in cells A (green) and B (purple) are shown. The lowest ORR overpotentials are achieved by active sites containing Fe, Ir, Mn and Rh, whereas the lowest OER overpotentials are achieved by active sites of Co, Rh, Ir, and Fe.
A substrate binds to a specific region on an enzyme known as the active site, where the substrate can be converted to product. The substrate binds to the enzyme primarily through hydrogen bonding and …