How Sequencing Is Done

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At JGI, we use whole-genome shotgun sequencing. This is a technique for determining the DNA sequence of a genome by randomly shearing the DNA, sequencing multiple fragments whose sequences overlap, and inferring the original sequence by reassembling the fragments. Three sizes of fragments are sequenced, 2-4 kb (kilobase, or 1000 bases), 8-10 kb, and 40 kb. This explanation follows the procedure for 2-4-kb fragments.

Animation of the JGI production sequencing process

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