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UL44-FL is not required for ppUL44 binding to pUL54 and homodimerization. COS-7 cells were transfected to express GFP-UL54(1213-1242) (A) or GFP-UL44ΔNLS (B), in the absence or the presence of the indicated DsRed2-UL44 fusions. Cells were imaged 24 to 36 h after transfection by CLSM. Merged images of the green (GFP) and red (DsRed2) channels are shown on the right, with yellow coloration indicative of colocalization.
