We can reproduce the reconstitution of the repertoire by thymic output and peripheral division with the model as presented here, but the constant-death-rate assumption will need to be modified to take into account the abundance of trophic factors during recovery from lymphopenia and heterogeneity in TCR and IL-7R expression levels (Palmer et al., 2011, Singh et al., 2012). Here, IL7R is linked to lymphopenia.