Cell Markers Vcam-1 VLA-4 SCF CD34 CD45 CD10 CD19 CD24 VLA-4 c-Kit IL-7 IL-7 IL-7R IL-7 CD40 CD40 CD40 CD40 CD40 CD40 CD40 CD40 CD34 CD45 MHC Class  II CD10 CD79 CD19 CD20 CD38 VpreB CD79 BCR CD45R CD10 CD39 CD19 CD38 CD20 CD20 CD20 CD20 CD20 CD20 CD79 VpreB VpreB CD79 CD25 CD45R MHC Class II CD22 IgM CD19 CD19 CD19 CD19 CD19 CD19 IgM IgM IgM IgM IgM IgM CD79 CD79 CD79 CD79 CD79 CD79 CD79 CD79 CD79 CD19 Light Chains CD28 CD93 CD93 CD93 IgM IgM IgD IgD IgD IgD IgD IgD CD20 CD21 CD21 CD21 CD21 CD21 CD21 CD22 CD22 Th1 Patwhay CD24 CD24 CD24 Light Chains Baff-R Taci CD86 MHC Class II MHC Class II MHC Class II MHC Class II CD80 IgM CD79 CXCR5 CD45R CD23 CD93 IgD CD79 NFKB NFKB NFKB Notch2 IL-21 IL-5 IL-9 IL-13 IL-13 IL-4 TCR CD40L CD28 B7-1 Syk Lyn Bcl-10 AKT B-raf PKC ERK CD32 IL-2 IL-4 IL-21 IL-5 CD35 BCL6 CXCR4 BLIMP1 XBP-1 TLR CD45R CD74 IgD PNA CD36 CD79 IgM CD72 TLR CD1D CD23 CD19 CD45R CD86 CD80 CD19 CD27 CD20 IgM IgG IgA IgE CD27 CD138 IL-6 APRIL CD27 CD138 CD36 FC TGF-B IFN-y IL-4 IL-5 IL-1B IgD IgA IgE IgD BCR CAM BCR BCR BCR BCR BCR CXCL13 IKK NFAT PAX5 TdT B cell Development and Activation