Figure 2.

Illustration of the mutation and ADA2 activity. (A) Sanger sequencing analysis illustrating the point c.1358A>G mutation which was identified in both sisters. (B) Reverse quantitative PCR (RQ-PCR, copy number calculated) illustrating the exon 7 deletion in the two sisters and in the father. CECR1-E7a and CECR1-E7b are two distinct amplicons encompassing exon 7 of CECR1 gene, to avoid a possible rare polymorphism in a primer hybridisation site. (C) CECR1 mutations result in a decrease in ADA2 activity in patient plasma. The figure shows the ADA2 activity in the plasma of the two patients tested on two occasions, compared with ADA2 activity in the plasma of four controls (***p<0.001).