Fig. 1.
Immunohistochemical staining of a microwave-processed paraffin section of a formalin-fixed human tonsil with Ki-S2. Cell nuclei in the dark zone of a germinal center, which harbors proliferating cells, are strongly positive. APAAP staining.
Immunohistochemical staining of a microwave-processed paraffin section of a formalin-fixed human tonsil with Ki-S2. Cell nuclei in the dark zone of a germinal center, which harbors proliferating cells, are strongly positive. APAAP staining.
