| structural polypeptides of the enteropathogenic bovine coronavirus strain ly-138. | the bovine coronavirus strain ly-138 was purified by differential as well as velocity and isopycnic centrifugation in sucrose or cscl gradients. the substrate for purification was contents of the small intestine of experimentally inoculated calves. this strain is highly enteropathogenic, but it could not yet be propagated in cultured cells. intact virions had a density of 1.245 g/cm3 in cscl and 1.185 g/cm3 in sucrose. a spherical core-like structure with an average diameter of 82 nm remaining a ... | 1979 | 218536 |