Definition
In massively parallel sequencing, a read refers to the DNA sequence from one fragment (a small section of DNA).
Use in clinical context
Massively parallel sequencing technologies fragment the genome prior to sequencing, and each sequenced fragment produces a read. The length of the read and how many are produced will depend on fragment size and the type of technology being used. As the fragments of DNA usually overlap, the reads can be pieced back together to reconstruct the genome. There are other sequencing methods that do not fragment the genome; these methods are called long-read sequencing as they produce very long reads.
Related terms
Bioinformatician | Deoxyribonucleic acid (DNA) | Next-generation sequencing | Read depth | Read length | Sequence
