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The N-terminal residues 1–37 of PCV4 Cap are a nucleolar localization signal. (A) Schematic depicting the truncated mutants of PCV4 Cap in the context. (B) HEK293T cells were co-transfected with mCherry-NCL and GFP-PCV4-Cap-WT, Cap-M1, Cap-M2, Cap-M3, or Cap-M4 for 24 h. The HEK293T cells were incubated with DAPI and then observed under a confocal microscope. Scale bar, 10 μm.
