For a technical overview of the features of the Windows Media codecs, see About the Windows Media Codecs. The term codec is an amalgamation of the terms compressor and decompressor. A codec is usually implemented as a pair of COM objects: one for encoding content, and another for decoding content.
An allosteric effector can also act. negatively, inhibiting enzyme activity. Because allosteric regulators do not. bind to the same site on the protein. as the substrate, changing substrate. concentration generally does not. alter their effects. Of course there are other types of. regulation as well. Active site inhibitors: An inhibitory factor may bind to and block the active site. If this binding is reversible, then increasing the amount of substrate can over-come. the inhibition. An inhibitor of this type is known as a competitive inhibitor.
allosteric site that subunit of an enzyme molecule which binds with a nonsubstrate molecule, inducing a change in form or shape that results in inactivation of the enzyme for its substrate.