Methylation analysis of four SMN2 CGIs by MassARRAY
Black triangles represent mean methylation levels of each CpG unit within each SMN2 CGI in the SMA patients. The mean methylation levels of each SMN2 CGI are indicated by a horizontal line: (a) CGI 1: 76.7%, CGI 2: 59.9%, CGI 3: 13.5%, CGI 4: 70.0%; (b) CGI 1: 79.6%, CGI 2: 58.6%, CGI 3: 13.1%, CGI 4: 73.4%; (c) CGI 1: 77.8%, CGI 2: 56.8%, CGI 3: 12.8%, CGI 4: 68.0%