passages.id: split_9_validation_760_passage
passages.type: progene_text
passages.text: The same three sites , which all lie in the canonical PKB consensus sequences ( Arg-Xaa-Arg-Xaa-Xaa - ( Ser / Thr ) ) , became phosphorylated when FKHR was cotransfected with either PKB or PDK1 ( an upstream activator of PKB ) .