Formalin-fixed and paraffin-embedded human tonsil tissue (4 μm) stained with anti-CD23 antibody (DB 135) shows strong and distinct staining of the follicular dendritic cells in the germinal centres, and a strong and distinct membranous staining of the activated B-cells in the mantle zone of germinal center of the human tonsil.
Formalin-fixed and paraffin-embedded human colon adenocarcinoma (A, 4 μm), and Merkel cell carcinoma (B, 4 μm), stained with anti-Cytokeratin 20 antibody (DB 119) shows strong positive immunostaining of cancerous cells.
