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Exome sequencing workflow: part 1. Exome sequencing, also known as whole exome sequencing (WES), is a genomic technique for sequencing all of the protein-coding regions of genes in a genome (known as the exome). [1] It consists of two steps: the first step is to select only the subset of DNA that encodes proteins.
Sequencing may be performed on a single gene, a group of genes (panel testing), most of the coding region or exons (whole exome sequencing), or most of the genome (whole genome sequencing). With time, this technology is expected to be able to detect any abnormality of the human genome.
GeneDx currently offers tests for hundreds of rare diseases, as well as panels of genes and whole exome sequencing (20,000 gene) Mendelian disorders using massively-parallel DNA sequencing and deletion/duplication analysis of the associated gene(s).
Whole genome sequencing (WGS) is the process of determining the entirety, or nearly the entirety, of the DNA sequence of an organism's genome at a single time. [2] This entails sequencing all of an organism's chromosomal DNA as well as DNA contained in the mitochondria and, for plants, in the chloroplast.
The methods that are the most commonly used are whole exome sequencing and whole genome sequencing. Both approaches are used to identify genetic variations. Genome sequencing became more cost-effective over time, and made it applicable in the medical field, allowing scientists to understand which genes are attributed to specific diseases.
Whole-exome sequencing is a recent technology that has led to the discovery of various genetic disorders and increased the rate of diagnoses of patients with rare genetic disorders. Overall, whole-exome sequencing has allowed healthcare providers to diagnose 30–50% of patients who were thought to have rare Mendelian disorders. [citation ...
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