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Binding test of soluble TGEV spike protein on cryosections of porcine jejunum: cryosections were either pretreated (+NA) or not treated (-NA) with 300 mU neuraminidase prior to binding of soluble spikes. The control cryosections were incubated only with the fluorescence dye (CY3) labeled secondary antibody. No decrease in the binding of TGEV spikes was observed after neuraminidase treatment.
