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Definitions of G Protein Signaling Regulators

  1. Proteins that regulate the signaling activity of GTP- BINDING PROTEINS. They are divided into three categories depending upon whether they stimulate GTPase activity ( GTPASE- ACTIVATING PROTEINS), inhibit release of GDP; ( GUANINE NUCLEOTIDE DISSOCIATION INHIBITORS); or exchange GTP for GDP; ( GUANINE NUCLEOTIDE EXCHANGE FACTORS).
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