that have a profound impact on a person's risk of developing it. By being able to sequence more genomes faster and more cheaply, Gabriel says they’ll be able to find additional genes that have a more subtle effect on the condition. “Once you have bigger data, the signal becomes clearer,” she says.
Illumina’s sequencers use a method called “sequencing by synthesis” to decipher DNA. This process first requires that DNA strands, which are usually in double-helix form, be split into single strands. The DNA is then broken into short fragments that are spread onto a flow cell—a glass surface about the size of a smartphone. When a flow cell is loaded into the sequencer, the machine attaches color-coded fluorescent tags to each base: A, C, G, and T.
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