Fig. 1From: IL-10 producing regulatory B cells are decreased in blood from smokers and COPD patientsImmunohistochemistry (IHC) of IL-10 producing regulatory B cells in human lung tissue. Representative images of IL-10 + CD20 + double positive immunofluorescent staining showing positive signal in A human lung parenchyma within proximity of an airway, and B lymphoid follicles found in human lung samples. All images were taken at a 630 × magnification. Small images are individual channel results. White arrows point towards IL-10 + CD20 + double positive cellsBack to article page