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  1. PI3Kβ is selectively required for growth factor-stimulated macropinocytosis
  2. A single discrete Rab5-binding site in phosphoinositide 3-kinase β is required for tumor cell invasion
  3. Rac1-stimulated macropinocytosis enhances Gβγ activation of PI3Kβ
  4. Targeting the MAP kinase pathway in astrocytoma cells using a recombinant anthrax lethal toxin as a way to inhibit cell motility and invasion