Pseudo-response regulators (PRRs) are a class of proteins involved in the regulation of circadian rhythms and other biochemical pathways in various organisms, including plants and microbes. They are part of a broader family known as response regulators, which are involved in two-component signaling systems. While traditional response regulators typically participate in signaling pathways that involve phosphorylation (a common post-translational modification that can activate or deactivate protein functions), PRRs function differently.
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