J. and PI3Kis ubiquitous in mammalian tissues, whereas PI3Kand PI3Kshow a more restricted distribution in leukocytes.4 PI3K is a heterodimeric protein consisting of a catalytic p110 subunit and a p85 regulatory subunit.5 The p110R subunit contains N-terminal adaptor-binding (ABD), Ras-binding, C2, helical, and catalytic kinase domains. The ABD domain name […]