Fig. 5From: Facioscapulohumeral muscular dystrophy: genetics, gene activation and downstream signalling with regard to recent therapeutic approaches: an updateSchematic representation of the methods used for FSHD1 diagnosis. The D4Z4 repeat array is indicated with triangles (in dark blue). D4Z4 repeat units on chromosomes 4 and 10 can be separated because all repeats on 10q contain BlnI restriction sites (whereas all D4Z4 repeats on 4q contain XapI restriction sites) [238]Back to article page