Figure 2

The 1000 Genomes Project uses a variety of next generation DNA sequencing machines (also known as scanners). Some use paired-end DNA strands (schematic above). These scans give the DNA base sequence at both ends (shown as solid black). Only the approximate number of bases between the ends is known. The scanner does not report the sequence of bases between the ends. With paired-end scanners, the two ends together are referred to as a single “DNA measurement”. Other scans only contain the sequence of bases at one end of the DNA strand. In these cases there is also one “DNA measurement” per DNA molecule.