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    题名 作者 年代 出处 被引量
1Photosensitive damage of lysozyme caused by pazufloxacin and the protective effect of ferulic acid显示文摘Laser flash photolysis and sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE) experiments were carried out to study the photosensitive damage induced by pazufloxacin(PAX) and the protection of lysozyme(Lyso) by ferulic acid(FCA), an active antioxidant. Transient absorption spectra revealed electron transfer from Lyso and FCA to 3PAX*, with respective bimolecular reaction rate constants of 6.3×107 and 1.4×1010 dm3/(mol s). A pulse radiolysis study was also performed to investigate the formation of Lyso radical cations. Results showed that FCA effectively inhibited the cross-linking of protein induced by fluoroquinolones. Finally, a mechanism of the protective effect of FCA on Lyso was proposed.Yulie Xu Yancheng Liu Haixia Li Peng Zhang Jianfeng Zhao Wenfeng Wang 2015Science China Chemistry2015,58,3:2
2Logic-signal output of fluorescent proteins for screening antibiotic combinations显示文摘A new method to screen antibiotic combinations is demonstrated,which takes advantage of the logic-signal output of genetically engineered drug-resistant E.coli strains expressing different fluorescent proteins.Thirty-six antibiotic combinations for nine antibiotics were investigated.The operation of different logic gates can reveal the susceptibility,resistance,or synergistic effect of the antibiotic combinations in a rapid(7–8 h versus 24–28 h for typical growth-based assays),simple,quantitative and high-throughput manner.This logic-signal-based output patterns provide the basis for novel and reliable screening of antibiotic combinations and help us to both gain insight into the mechanisms of multi-drug action.LV Feng Ting LIU Li Bing WANG Shu 2014Science China Chemistry2014,57,12:1
3Single-molecule-force spectroscopy study of the mechanism of interactions between TSP-1 and CD47显示文摘The 4N1K peptide,which is derived from the C-terminal domain of thrombospondin-1(TSP-1),is usually used as a functional mimic peptide for TSP-1.Knowledge about the interaction force of 4N1K/CD47 is important in explaining how TSP-1 affects the biological effect of CD47.Here we used a single-molecule force spectroscopy(SMFS)technique to explore the interaction of 4N1K/CD47 on both normal and oxidative human red blood cells(h RBCs)at single-molecule level.There was no interaction force between 4N1K and CD47 on normal h RBCs;however,we did find 4N1K-bound CD47 on oxidative h RBCs.We also detected interaction forces for 4N1K/CD47ex(extracellular domain of human CD47),and 4N1K/oxidative CD47ex.The interaction forces of 4N1K/CD47ex were almost consistent with those of 4N1K/oxidative CD47ex at the same loading rate.These results suggest that the conformational change of CD47 is critical for 4N1K-CD47 interaction on oxidative h RBCs.PAN Yan Gang WANG Feng LIU Yan Hou YANG Yong-Guang WANG Hong Da 2014Science China Chemistry2014,57,12:0
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