vi) Prepare a solution of MAb M10 at the previously determined dilution.
vii) Treat the cell monolayers with the MAb solution for 30 minutes at 37°C in a humid chamber.
viii) Rinse the cells three times for 5 minutes with PBS.
ix) Incubate with a specific anti-mouse fluorescein isothiocyanate (FITC)-conjugated antibody
(prepared according to the supplier’s instructions) for 30 minutes at 37°C in darkness in a humid
chamber.
x) Rinse three times for 5 minutes with PBS.
xi) Examine the treated cell monolayers on plastic plates immediately, or mount the cover-slips
using glycerol saline at pH 8.5 prior to microscopic observation.
xii) Examine under incident UV light using a microscope with ×10 eye pieces and ×20–40 objective
lenses. Positive and negative controls must be found to give the expected results prior to any
other observation. Positive results are indicated by diffuse fluorescence throughout the
cytoplasm.