Phosphoinositide 3-kinase regulatory subunit 4, also known as PI3-kinase regulatory subunit 4 or PI3-kinase p150 subunit or phosphoinositide 3-kinase adaptor protein, or VPS15 is an enzyme that in humans is encoded by the PIK3R4gene.
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Jin J, Smith FD, Stark C, et al. (2004). "Proteomic, functional, and domain-based analysis of in vivo 14-3-3 binding proteins involved in cytoskeletal regulation and cellular organization". Curr. Biol. 14 (16): 1436–50. doi:10.1016/j.cub.2004.07.051. PMID15324660.
Takeshita F, Gursel I, Ishii KJ, et al. (2004). "Signal transduction pathways mediated by the interaction of CpG DNA with Toll-like receptor 9". Semin. Immunol. 16 (1): 17–22. doi:10.1016/j.smim.2003.10.009. PMID14751759.