Ribosomal Protein S6 Kinases, 90-kDa

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Ribosomal Protein S6 Kinases, 90-kDa

A family of ribosomal protein S6 kinases that are structurally distinguished from RIBOSOMAL PROTEIN KINASES, 70-kDa by their apparent molecular size and the fact they contain two functional kinase domains. Although considered RIBOSOMAL PROTEIN S6 KINASES members of this family are activated via the MAP KINASE SIGNALING SYSTEM and have been shown to act on a diverse array of substrates that are involved in cellular regulation such as RIBOSOMAL PROTEIN S6 and CAMP RESPONSE ELEMENT-BINDING PROTEIN.