Immunohistochemical staining of human tonsil with the patient-1 scFv. Overview (A) and detail (B) of the distribution pattern and morphology of the cells stained by the patient-1 scFv (CSA amplification system; Dakocytomation). Images were obtained with an Olympus AX70 microscope (Olympus, Tokyo, Japan) equipped with a JVC KY-F70U camera (JVC, Kyoto, Japan) using Diskus v4.28 software (Hilgers, Königswinter, Germany). Images were captured with (A) a 4 ×/0.16 NA objective (total magnification, × 6.4) and (B) a 20 ×/0.7 NA objective (total magnification, × 140).