Figure 1.
Overview of the MS-MLPA procedure (Nygren et al, 2005). The gene-specific probes spanning a recognition site for the restriction enzyme Hha1 are hybridised to the target DNA and subsequently ligated and digested with the methylation-sensitive enzyme Hha1. Undigested probes, that is probes of which the recognition sequence is methylated, will be amplified. If the CpG site is unmethylated, the DNA/probe complex will be digested and no amplification will take place. For each DNA sample, the MS-MLPA was performed with and without Hha1 digestion.