MERS S-2P protein  Binds to DPP4 receptor and MERS-CoV S-NTD, RBD, and S2-specific neutralizing mAbs (G2, D12, and G4, respectively)  SAS  I.M.  BALB/c mice  Elicits neutralizing Abs in mice, neutralizing 7 pseudotyped MERS-CoV  N/A  N/A  Pallesen et al., 2017