Knob domain of the fiber protein of capsid suppresses allergen-induced airway cellular inflammation. A, Representative SDS-PAGE of recombinant knob (2 μg per lane). B and C, Total numbers of inflammatory cells in BALF and lung tissue of saline- and OVA-challenged mice with and without knob. D–F, BALF differential cell (Fig 2, D) and lung tissue eosinophil (Fig 2, E and F) counts in mice described in Fig 2, B. Scale bar = 50 μm. Sal, Saline. *P < .05 compared with the OVA group.