Number of Genes,Percentage of genes,Immune Process 1,0,Antigen Sampling in Mucosal-Associated Lymphoid Tissue 2,0,B Cell Selection 8,0,Tolerance Induction 27,0.2,T cell Selection 46,0.3,Leukocyte Homeostasis 55,0.3,Somatic Diversification of Immune Receptors 115,0.7,Leukocyte Migration 125,0.8,Antigen Processing and Presentation 197,1.2,Activation of Immune Response 326,2,Regulation of Immune System Process 335,2,Immune Effector Process 503,3.1,Leukocyte Activation 523,3.2,Immune System Development 744,4.5,Immune Response