Figure 1.

Cellular Effects of Ionizing Radiation. Photons of radiation produce direct DNA damage, but it is less likely than indirect damage, where photons eject electrons from target biomolecules in the cytoplasm, creating multiple ionizations, especially in oxygen compounds and producing free radicals, which break DNA.

Palacios et al. BMC Urology 2013 13:4   doi:10.1186/1471-2490-13-4
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