Struktur-Funktionsanalyse der Gßγ-vermittelten Gbetagamma-vermittelten Aktivierung der Phosphoinositid-3-Kinase -γ Phosphoinositid-3-Kinase-gamma: = Structural and functional analysis of Gßγ-induced Gbetagamma-induced stimulation of phosphoinositide 3-kinase γ phosphoinositide 3-kinase gamma