“…Calcium-induced activation of MEF2D (mediated by calcineurin) and CREB (mediated by CaMKIV/GR) appears to be important for BZLF1 promoter activation following ligation of the B-cell receptor Liu et al, 1997). The inducing effect of phorbol esters is mediated through protein kinase C (PKC) (Davies et al, 1991), and also primarily requires the ZI and ZII binding motifs in the BZLF1 promoter , although the intermediary factors are not well defined. However, PKC activation is not required for induction of lytic EBV by certain stimuli (Gradoville et al, 2002).…”