Figure 3. Mathematical model for permissive selection in GCs.

The probability of a LZ GC B cell being selected for cell division is a function of its BCR avidity relative to its GC competitors. GC B cells whose BCRs surpass some avidity threshold (T) are guaranteed to divide, while those with the lowest-avidity BCRs have a small-but-non-zero probability of receiving selection signals. Adapted from (38).