Nanopore sequencing of DNA. The Minion nanopore sequencer is designed to determine the order in which nucleotides occur on a strand of DNA (deoxyribonucleic acid). A nanopore is a hole in a membrane with a diameter of around 1 nanometre. When a nanopore is immersed in a conducting fluid and a voltage is applied across it,ions are conducted through it creating a current. When a strand of DNA passes through the nanopore,each nucleotide obstructs the nanopore to a different,characteristic degree,creating a characteristic change in the current. The current changes represent a direct reading of the DNA sequence. Photographed at Genoscope National Sequencing Centre,University of Evry,France | |
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