title: Purification and further characterization of an "IBV-like" virus (coronavirus).
mesh_terms: D001921:Brain / Q000382:microbiology; D002499:Centrifugation, Density Gradient; D007122:Immunoelectrophoresis; D008854:Microscopy, Electron; D014776:Virus Cultivation; D014780:Viruses / Q000302:isolation & purification*