Cutting edge: An in vivo reporter reveals active B cell receptor signaling in the germinal center.

Abstract excerpt

Long-lasting Ab responses rely on the germinal center (GC), where B cells bearing high-affinity Ag receptors are selected from a randomly mutated pool to populate the memory and plasma cell compartments. Signaling downstream of the BCR is dampened in GC B cells, raising the possibility that Ag presentation and competition for T cell help, rather than Ag-dependent signaling per se, drive these critical selection...

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