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The N-terminal domain of SARS-CoV N protein interacts with the C-terminal domain of the PKL protein in the yeast two-hybrid system. A The various constructs used for the yeast two-hybrid system. B Growth of yeast (JY980), either mock-transfected or transfected with plasmids as indicated on YEPD without tryptophan and leucine (left panel), or on YEPD without tryptophan, leucine and histidine (right panel)
