Representative histograms of CD40L expression in patients with XHIM using an anti-CD40L pAb, four MoAbs, and bCD40-Ig. The histograms are similar to those described in Fig 1. The reagents used for immunostaining are indicated on the left and the mutations represented by the cell lines and the assigned staining type are listed at the top. See Table 2 for the definition of the immunostaining type.