作者: Ying Shao , Yong Ding , Zhao-Li Jia , Xiao-Min Lu , Zhi-Hong Ke
DOI: 10.1016/J.BMC.2009.05.044
关键词:
摘要: Abstract 2-Hydrazinyl-1,4,5,6-tetrahydropyrimidin-5-ol dihydrochloride 2 , as well 2-hydrazinyl-4,5-dihydro-1 H -imidazole 1 was synthesized metal-free DNA cleaving agent. Agarose gel electrophoresis used to assess the plasmid pUC 19 cleavage activities in presence of and . efficiency exhibits remarkable increases compared with its corresponding non-hydroxy compound Kinetic data promoted by fit Michaelis–Menten-type equation k max 0.0378 ± 0.0013 h −1 giving 10 6 -fold rate acceleration over uncatalyzed DNA. The is driven spatial proximity nucleophilic hydroxy group electrophilic activation for phosphodiester ammonium and/or guanidinium groups. In vitro cytotoxic toward Hela cells human leukemia HL-60 were also examined, stronger than