Results showed that upon near-UV-irradiation,psoralen coul d be targeted to the repetitive sequences of telomeres and the psoralen cross-li nking products increased with increase of irradiation time.

• 原子力显微镜(AFM)的直接观测结果表明在UVA照射下，补骨脂素可结合到端粒DNA的特殊位置，其光交链产物随照射时间增长而增加。