. . . . "48" . . . . . "Identification of two mutation sites in spike and envelope proteins mediating optimal cellular infection of porcine epidemic diarrhea virus from different pathways" . . . _:b662930277 . . . . . . . . . . . . . . . "10.1186/s13567-017-0449-y" . . . . . _:b662930277 . . . _:b662930277 "2023-12-22T00:32:03.744940"^^ . . . . . "48" . . . . . . . . . "6a0f7cfb9306380e01f35d7f8c0e75c0f91dcbc4" . . . _:b662930277 . . . . . "2017-08-30"^^ . _:b662930277 . . "10.1186/s13567-017-0449-y" . . "Springer Science and Business Media LLC" . . . . . "10.1186/s13567-017-0449-y" . . . _:b662930277 . . .