What changed
RNA sequence could direct programmable DNA cleavage in the demonstrated system.
Scientific scope
The 2012 biochemical Cas9 mechanism and engineered single-guide RNA described by Jinek and colleagues.
Evidence
The cited historical record or published author account supports this scoped contribution. The source-reading boundary is stated at each link; a WRS grade is not an independent scientific validation.
Contributors
- Jinek, Chylinski, Fonfara, Hauer, Doudna and Charpentier · SCIENCE: The recorded biochemical mechanism paper; earlier and later groups remain distinct.
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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