One novel sequencing technique includes using a very rapid video camera and microscope to observe DNA polymerase molecules as they duplicate DNA - the same enzymes that generate new copies of DNA in our cells - and combining multiple hues of brilliant dyes, one for each letter A, T, C, and G. This approach delivers information that is distinct and extremely valuable from that offered by the most commonly used instrument systems. Its use of micropores to sequence DNA is yet an emerging technique under research. Individual DNA strands are threaded through extremely small holes in a membrane. There are various DNA sequencing methods online which you can read for better understanding.