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What it is 

Genomes and exomes are the -omes that usually get sequenced. Whole genome sequencing (WGS) covers exactly what it says: the whole genome, which, in people, consists of 3 billion chemical “letters” (nucleotides — those famous A’s, T’s, C’s, and G’s). Exons, which are the sections of DNA that actually produce proteins, make up about 1 percent of a human’s DNA sequence; they’re the only parts sequenced with whole exome sequencing (WES).

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