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Unformatted text preview: regulatory molecule may serve as an activator of enzyme activity rather than an inhibitor. For example, oxygen is carriedby myoglobin (a monomer) and hemoglobin (a tetramer of two alpha and two beta subunits ). The hemoglobin is an allosteric enzyme and can release more oxygen to venous tissue than myoblobin. (Fig. 1). Phosphorylation Enzymes can also be regulated by covalent modifications such as Phosphorylation. Phosphorylation may stimulate or inhibit enzyme activity, depending on the individual enzyme. The phosphate for phosphorylation is supplied by ATP....
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This document was uploaded on 11/03/2011 for the course BIOLOGY MCB2010 at Broward College.
- Fall '10