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MERS-Uganda spike does not utilize DPP4 for infection. (A and B) Vero cells were infected with MERS-CoV or MERS-Uganda chimeric virus in the presence or absence of trypsin and a blocking antibody against human DPP4. (A) Fluorescent microscopy showing RFP expression 24 hours postinfection for each treatment group. (B) Western blot of N protein and actin 24 hours postinfection.
