sentence: Moreover , the binding specificity of Wdb – and possibly of PP2A complexed to Wdb – is dependent on CycG : Wdb binding to Akt1 in imaginal tissues , but not in ovarian nurse cells , is only possible in the absence of CycG protein.16 ,29 Perhaps PP2A is less likely to recruit a B ′ subunit bound to CycG , which thereby influences PP2A subunit assembly , changing PP2A specificity for its targets ( Fig. 4 ) .