Germinal CenterB-LymphocytesDendritic Cells, FollicularPalatine TonsilReceptors, CXCR5Antigenic ModulationSomatic Hypermutation, ImmunoglobulinB-Lymphocyte SubsetsPhenylacetatesImmunoglobulin Class SwitchingNitrophenolsInducible T-Cell Co-Stimulator ProteinPlasma CellsAntibody AffinitySpleenCell DifferentiationImmunologic MemoryLymphocyte ActivationAntibody FormationMice, Inbred C57BLMice, KnockoutImmunoglobulin GT-LymphocytesMice, TransgenicMice, Inbred BALB CProto-Oncogene Proteins c-bcl-6Lymphoma, B-CellLymphoid TissueLymphoma, Large B-Cell, DiffuseLymph NodesChemokine CXCL13Gene Rearrangement, B-LymphocyteGenes, ImmunoglobulinImmunoglobulin Variable RegionLymphoma, FollicularReceptors, Antigen, B-CellAntigens, CD40Immunoglobulin Heavy ChainsAntigens, T-IndependentImmunoglobulin DPeyer's PatchesCytidine DeaminasePeanut AgglutininImmunoglobulin MT-Lymphocytes, Helper-Inducer