BRCA1 and BRCA2 Mutation in Romanian Population: a Study of Genotype - Phenotype Correlation at Diagnosis With Prospective Disease Outcome and Survival

Firstly many pairs of probes, containing: a universal primer sequence, a specific hybridisation target sequence and a stuffer DNA region to vary the size of the resulting product, are hybridised adjacent to each other on the target DNA strand .The two adjacent probe sequences are ligated to form a continuous section of DNA.The ligated probes are then amplified using PCR. The amplified fragments are analysed by capillary electrophoresis to detect the different fragment lengths. These data can be analysed to show the relative copy number of each fragment that is present in the sample.