论文部分内容阅读
姊妹染色单体互换(SCE)是染色单体之间DNA交换的结果。SCE的频率是遗传学不稳定性和早期染色体变化的灵敏指标。在检出人类受到各种诱变致癌物所引起的遗传学损伤中,SCE的分析是一种有用的技术。本文报告了四个种族正常的SCE频率。其中包括高加索人,美国黑人,东方人和美国本地人共32名健康成人,男女均有。这些人6个月内无明显病史,无服药或受X线照射史。所选择的被检查者没有亲戚关系,在遗传上并无混杂或种族间的混血,而且均住美国,也都未受过环境或职业性照射。其中东
Sister chromatid exchange (SCE) is the result of DNA exchange between the chromatids. The frequency of SCE is a sensitive indicator of genetic instability and early chromosomal changes. Analysis of SCE is a useful technique in detecting genetic damage caused by various mutagenic carcinogens. This article reports four normal ethnic SCE frequencies. Including Caucasian, Afro-Americans, Asians and Native Americans a total of 32 healthy adults, both men and women. These people within 6 months no significant history, no medication or history of X-ray irradiation. The selected subjects were not related, genetically mixed or interracial, living in the United States, nor were they exposed to environmental or occupational exposure. Middle East