NFKB c-Jun ERK2 JNK1 p38 AKT PKC Phosphotyrosine Phosphotyrosine Phosphotyrosine Phosphotyrosine Phosphotyrosine Phosphotyrosine GSK3B mTOR Phosphotyrosine Phosphotyrosine FYN SYK LYN CD22 CD45 CD19 CD21 CD61 IgG CD32 CREB MKK B-Cell Receptor Pathway