π€ Ballesteros, M. L. Keywords π closely related (222) π recombinant viruses (43) π amino acid (454) π gastroenteritis coronavirus (57) π respiratory tract (344) π amino acids (205) π transmissible gastroenteritis (226) Articles (1) Two amino acid changes at the N-terminus of transmissible gastroenteritis coronavirus spike protein result in the loss of enteric tropism π€ Ballesteros, M. L. π€ SΓ‘nchez, C. M. π€ Enjuanes, L. β° 1997 π Virology