"This download contains the Nextera Rapid Capture Exome target region intervals that do not overlap the Nextera Rapid Capture Expanded Exome target regions. There are a total of 4.1 MB that are unique to the Exome product. 336,295 intervals across 205,598 Exome targeted regions. This was determined by base overlap only. For example, comparing an Exome product region at Chr 1 position 300 – 500 with an Expanded Exome region at Chr 1 position 305 – 495 results in a 191 bp overlap and two 5 bp ""unique regions"" for the Exome product."