The past year has seen significant advances in our understanding of ho
w protein kinase B (PKB) is activated and of the central role it plays
in insulin signalling and in mediating the protective effects of surv
ival factors against apoptosis. The highlights include the discovery o
f a protein kinase required for the 3-phosphoinositide-dependent activ
ation of PKB and the identification of several physiological substrate
s for PKB.