Short-range noncovalent bond interactions

Short-Range Noncovalent Bond Interactions in Molecular Switching Processes... 

In summary, the interactions between rhodopsin and its two partners, transducin and arrestin, echo the general scheme of interactions of mobile electron carriers, discussed earlier, despite the differences in terms of structures and functions. Again, nature deployed short-range noncovalent bond interactions to make collisions and reactions between encountering partners more deterministic than random processes. Nature also orchestrated the sequence of events with appropriate timing. When the interactions between Gt and Mil need to be more deterministic, the interactions between arrestin and Mil are made more random. Conversely, when the interactions between arrestin and Mil need to be more deterministic. 

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