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6 January, 17:09

Which of the following effects is least likely to be mediated by a scaffolding protein? Increase the local concentration of signaling components. Decrease allosteric effects and cooperative binding of second messengers to their targets. Regulate the order in which a series of kinases can become activated following receipt of a signal. Decrease likelihood of crosstalk between signaling pathways that share a common kinase. Allow rapid negative feedback of a signaling response.

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  1. 6 January, 17:37
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    The correct answer is: Decrease allosteric effects and cooperative binding of second messengers to their targets.

    Scaffold proteins are considered regulatory proteins that affect many signal pathways. Some of their functions are:

    • Regulation and coordination of positive and negative feedback signals

    • Localizing signal components within the cell (in different cell compartments)

    • Tethering signaling components (assembling signal components into complexes in order to increase signal efficiency).
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