Fig. 1.

Age-dependent insertion length distributions. Shown are distributions of the number of N insertions at the VD junction, $P(\mathrm{insVD})$, and at the DJ junction, $P(\mathrm{insDJ})$, inferred from individual mouse thymus datasets at different ages: embryo day 17 (E17) and 4 d, 21 d, and 42 d postbirth (D4, D21, and D42). The error bars indicate the variation across individuals (Table S1).