n-3 PUFAs in lean and obese mice have no impact on the proportion of B cells in the bone marrow. Percentage of B220loIgM− (pre/pro), B220loIgM+ (immature), and B220hiIgM+ (mature) B cells in the bone marrow of mice injected with antigen. Mice were fed control, n-3 PUFA, high-fat, and high-fat + n-3 PUFA diets for 10 weeks. Data are from six independent experiments.