| adaptive evolution of mers-cov to species variation in dpp4. | middle east respiratory syndrome coronavirus (mers-cov) likely originated in bats and passed to humans through dromedary camels; however, the genetic mechanisms underlying cross-species adaptation remain poorly understood. variation in the host receptor, dipeptidyl peptidase 4 (dpp4), can block the interaction with the mers-cov spike protein and form a species barrier to infection. to better understand the species adaptability of mers-cov, we identified a suboptimal species-derived variant of dp ... | 2018 | 30110630 |