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Both B19 virus infection and NS11 transfection induce expression of p21/WAF1. Expression levels of p21/WAF1 and NS1 were analyzed sequentially in 293T cells transfected with pMP6 or pMP6-NS1 plasmids (A) and in UT7/Epo-S1 cells infected with B19 virus (B) by Western blotting with anti-NS1 and anti-p21/WAF1 MAbs, respectively.
