(F) Flow cytometry analysis of cell surface markers in WT and MSR1-/- M0 macrophages and M2(IL-4) macrophages untreated or stimulated with the MSR1 ligands fucoidan (50 μg/ml, 24 h). Data shows MSR1-dependent increase of the early activation markers CD54, CD69 and CD86 and a decrease of the M2 marker CD301b/Mgl2. CD11b serves as a control. 