Figure 2From: Comparative analysis of the activation of unfolded protein response by spike proteins of severe acute respiratory syndrome coronavirus and human coronavirus HKU1Proteolytic cleavage of SARS-CoV S protein by TMPRSS2. 293FT cells were cotransfected with FLAG-tagged TMPRSS1/4/2 and V5-tagged S proteins. Western blotting was performed with anti-V5 and anti-FLAG antibodies. Arrow points to S1 subunit of SARS-CoV.Back to article page