CHO cell clones stably expressing SLAMs of various species. (A) CHO.Neo, CHO.B95aSLAM, and CHO.SLAM cells were stained with IPO-3 (solid profile) or mouse control IgG antibody (open profile), followed by staining with FITC-labeled goat anti-mouse IgG. (B) CHO.Neo, CHO.DogSLAMtag, and CHO.CowSLAMtag cells were stained with anti-influenza virus HA epitope MAb 12CA5 (solid profile) or mouse control IgG antibody (open profile), followed by staining with FITC-labeled goat anti-mouse IgG.