They can be used even when there is no information available about inactive molecules.
These results are in agreement with the assumption that ENV1 does not directly regulate the transcription of its target genes (at least not generally), but executes its function indirectly by interaction with transcriptional regulators, which are not available or inactive in darkness.
For a number of dietary supplement products, the available information on inactive ingredients was incomplete or unclear.
During G0, a readily available supply of inactive RNA polymerase must be present in cells that are capable of dividing.
We made the assumption that a signal at the allosteric site is most likely propagated through the couplings already available in the inactive state (19).
Under the stated assumptions, the dual mechanism could appear essentially as either single or double activation, depending on the ratio between the rate constants of both process and the available amount of inactive protein.
High-resolution crystal structures are now available for the inactive state of the β2AR (Cherezov et al, 2007; Rasmussen et al, 2007; Rosenbaum et al, 2007); yet, we still know very little about the structure, stoichiometry and dynamics of oligomers in lipid bilayers.
However, structure-based screening methods are still restricted as most of the GPCR structures currently available are in an inactive conformation and have been resolved with orthosteric and not allosteric ligands.
Here we have compared the available GPCR structures (in inactive conformations) and identified key distinguishing structural features.
