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photon
Photon
Quantum of electromagnetic radiation. UV photons (200–400 nm) cause pyrimidine dimers in DNA; ionizing γ/X-ray photons generate double-strand breaks via free radicals. Visible photons (400–700 nm) drive retinal photoisomerization, circadian signalling.
Entry Metadata
| Field | Value |
|---|---|
| ID | photon |
| Name | Photon |
| Status | draft |
| Last reviewed | 2026-06-05 |
| Atlas | 01-human |
| Scale | 01-subatomic |
Cross-Atlas Connections
Sources
- Sancar A, Lindsey-Boltz LA, Ünsal-Kaçmaz K, Linn S. Molecular mechanisms of mammalian DNA repair and the DNA damage checkpoints. Annu Rev Biochem. 2004;73:39-85. · PubMed 15189136
- Löbrich M, Jeggo PA. The impact of a negligent G2/M checkpoint on genomic instability and cancer induction. Nat Rev Cancer. 2007;7(11):861-9. · PubMed 17943134