Medical Genetics 紫外线 胸腺嘧啶 二聚体
Medical Genetics
Medical Genetics Gamma and X-Rays These can act directly on DNA however, most damage is caused indirectly when molecules around the DNA such as water are ionized creating free-radicals, substances With unpaired electrons
Medical Genetics Gamma and X-Rays These can act directly on DNA; however, most damage is caused indirectly when molecules around the DNA such as water, are ionized, creating free-radicals, substances with unpaired electrons
Medical Genetics Most often the result is single or double stranded breaks in the dna molecules. these breaks are hard to repair because they often leave a phosphate tacked onto the 3 OH where the break occurs
Medical Genetics Most often, the result is single or double stranded breaks in the DNA molecules. These breaks are hard to repair because they often leave a phosphate tacked onto the 3' OH, where the break occurs
Medical Genetics Chemical Agents Examples of substances that are mutagens are nitrous acid hydroxylamine, ethyl methanesulfonate, 5-bromouracil celery, benzo(a) pyrene acridine dyes, fungally contaminated peanuts or peanut butter, and many, many more
Medical Genetics Chemical Agents Examples of substances that are mutagens are nitrous acid, hydroxylamine, ethyl methanesulfonate, 5-bromouracil, celery, benzo (a) pyrene, acridine dyes, fungally contaminated peanuts or peanut butter, and many, many more
Medical Genetics Hydroxylating agents (hydroxy lamine, HA) HA G G
Medical Genetics Hydroxylating agents (hydroxylamine，HA)