"Pigs" . "Proteins" . "Ecological connectivity" . "Animal virology" . "Mutation" . "Tunnels" . "Molecular biology" . "Proteomics" . "Mammals described in 1758" . "Molecular study of porcine transmissible gastroenteritis virus after serial animal passages revealed point mutations in S protein" . "Road traffic management" . "Molecular evolution" . . "Phylogenetics" . "Coprophagous animals" . "Taxa named by Carl Linnaeus" . "Alphacoronaviruses" . "Infraspecific virus taxa" . "Modification of genetic information" .