Fixed imprints of the spleen -were covered with MAb M10 and allowed to incubate at 37OC for 30 min in
a humidified chamber. After the slideshad been rinsed 3 times for 1 min withphosphate-buffered saline (PBS), the
secondary antibody with fluoresceinisothiocyanate (F1TC)-conjugated goat anti-mouse IgG was applied at 37°C for
30 min. The preparates were rinsed againwith PBS, mounted in glycerol, and examined with a microscope to identify
IF-positive cells