Figure 1: Electropherogram—after capillary electrophoresis in Agilent 2100 Bioanalyzer using Agilent DNA 1000 kit (Agilent Technologies)—of IGHV6-PCR product in one of the two patients of whom genomic DNA was extracted from blood sample and not bone marrow. Monoclonality of IGHV-PCR product is obvious (peak number 2) and was further confirmed by direct sequencing.