Figure 1From: Increased levels of (class switched) memory B cells in peripheral blood of current smokers Flow cytometry plots of B cells and memory B cells in peripheral blood. A representative example of the difference in percentage of CD20+ B cells between COPD (blue curve) and healthy (red curve) and the CD20+CD27+ gate to analyze the memory B cells is depicted in the upper panel. The CD27+IgM- gate for class switched memory B cells, the CD27+IgM+ gate for IgM+ memory B cells, and the CD27-IgM+ gate for naive B cells are shown for a current and a never smoker in the lower panel.Back to article page