Abstract
Sequencing techniques are at the forefront of medical diagnostics in the current era of personalized medicine and targeted therapy. These techniques can identify the exact genetic change at the nucleotide level which aids in delineating the molecular pathogenesis and may also help in development of tailored therapy. Different sequencing approaches can be used for either the discovery of new genetic aberrations or checking the known genetic change for diagnostic purposes, depending on the requirement. Next generation sequencing (NGS) refers to the post-Sanger technologies, i.e., sequencing technologies developed after Sanger sequencing. So, NGS includes a group of technologies having the capacity to sequence large segments of genome or entire genome in high-throughput experiments to detect genetic aberrations in a much faster and reliable way [1]. The current high-throughput NGS techniques, which are also being made available at affordable costs, are gradually replacing the conventional or first generation sequencing techniques in the clinical settings. In this chapter, the basic workflow of next generation sequencing (NGS) and its application in hematological disorders has been briefly discussed.
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Notes
- 1.
Coverage: The average number of times each base pair in the target genome is covered by reads. For example, 30× coverage implies that each base in the genome was covered by 30 reads on an average.
- 2.
Phred Quality score (Q) indicates base call accuracy and is logarithmically related to the probability of error (p) in base-calling. If Q is 10, then p is 1 in 10 and base call accuracy is 90%. If Q is 40, then p is 1 in 104, i.e., 1 in 10,000 and base call accuracy is 99.99%.
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Gupta, S.K. (2019). Role of Next Generation Sequencing (NGS) in Hematological Disorders. In: Saxena, R., Pati, H. (eds) Hematopathology. Springer, Singapore. https://doi.org/10.1007/978-981-13-7713-6_30
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DOI: https://doi.org/10.1007/978-981-13-7713-6_30
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