Fig. 1.

Location of CpG islands studied for PAX9 gene methylation. a UCSC browser view of PAX9 gene (chromosome 14q13.3). The probes used for methylation microarrays were specific for CpG islands 121, 129, 39, and 76. b MethPrimer based CpG prediction and primer design for bisulfite gene sequencing for two CpG islands (3 and 7) located at PAX9 upstream region. c Bisulfite sequencing of CpG islands 3 and 7 was performed in 21 and 23 CLL patients respectively and in five healthy controls. A representative electropherogram depicting two methylated (C) or unmethylated (T) CpG sites in island 3 located in 5’ region of PAX9 is shown