Lipid raft composition. Lipid rafts are composed of tightly packed sphingolipids and cholesterol-forming platforms that contain GPI anchored proteins, cytokine receptors, kinases, and GTPases that mediate cell signaling. From McGraw, K. (2013). Interrogation of EpoR fidelity in myelodysplastic syndrome hematopoiesis and stabilization by the immunomodulatory agent, lenalidomide (Doctoral Dissertation). Retrieved from Proquest Dissertations and Theses. (Accession Order No. 3588361).