Fig. 2
From: IL-10 producing regulatory B cells are decreased in blood from smokers and COPD patients
B cell subtypes in peripheral blood from healthy controls, smokers, and COPD patients determined by flow cytometry. Percentages of different B cell subsets within different groups (healthy controls, smokers without airway obstruction, and COPD patients) are depicted: A CD19 + CD20 + alive B cells within alive lymphocytes, B naive B cells (CD27-IgD + IgM −) within total B cells, C natural effector cells (CD27 + IgD + IgM +) within total B lymphocytes, D total memory B cells (CD27 + IgD −), E activated memory B cells (CD27 + IgD − IgM +), and F class-switched memory B cells (CD27 + IgD – IgM −) within total B lymphocytes