The Sequence of the Human Genome
Level 5 - mechanism / opinion, no new human data
Retrospective narrative commentary and historical overview without new clinical trial or empirical study data (design analogy).
OpenAlex W2165460636 · doi:10.1373/clinchem.2014.237016
What was done
This commentary reviews the methodology, history, and scientific impact of the 2001 whole-genome shotgun (WGS) sequencing of the human genome. The project used 350 capillary DNA sequencing machines to generate 25 million reads (~600 bp each) over 9 months from a mixture of five individuals, assembled via novel computational algorithms.
What was found
The project identified approximately 20,000 protein-coding genes (surpassing earlier estimates of 100,000–300,000), representing about 1% of the human genome. Humans share approximately 99.9% of DNA with each other and >95% with chimpanzees, with nonrandom distributions of genetic variants across the genome. The authors note that >99% of genomes sequenced since have used WGS methods.
Why it matters
It provides a historical account of the adoption of whole-genome shotgun sequencing and summarizes key biological metrics regarding human gene count and sequence diversity.
Limits
The record is a retrospective narrative commentary and Citation Classic reflection rather than a primary research paper. It presents historical summary numbers without new experimental data, confidence intervals, or formal methodological validation.
Cited by
- supports DNA sequencing has become over 10-million-fold cheaper compared to when direct sequencing was first pioneered.