The objectives of this and the following paper are to identify commonalities and disparities of the extended environment of mononuclear metal sites centering on Cu, Fe, Mn, and Zn. The extended environment of a metal site within a protein embodies at least three layers: the metal core, the ligand group, and the second shell, which is defined here to consist of all residues distant less than 3.5...

Novel GSH- and pH-responsive supramolecular vesicles constructed by an amphiphilic inclusion complex formed from water-soluble pillar[5]arene and lysine derivative have been successfully developed, which can efficiently encapsulate anticancer drug MTZ and show rapid MTZ-release in a simulated acidic tumor environment with high GSH concentration, and exhibit potent antitumor activity.

The active site-dependent electrochemical formic acid oxidation was evidenced by the increased coverage of Pt in the topmost mixed PtPd alloy layer of ternary PtPdCu upon potential cycling, which demonstrated two catalytic pathways only in one catalyst owing to surface atomic redistribution in an acidic electrolyte environment.

Two major ADH isozymes of mouse liver, basic ADH (Class I) and acidic ADH (Class III) were purified and the effects of various hydrophobic substances (t-butanol, butyramide, trifluoroethanol, trichloroacetic acid, stearic acid, oleamide, phenylalanine and norleucine) on their activities were investigated. All these hydrophobic substances activated acidic ADH with a range of from 15 to 560%, and...

Background and objectives: The seed extract of Silybum marianum contains seven flavonolignans known collectively as silymarin. These metabolites can be produced in hairy root cultures of S. marianum. The effect of different physical factors can change root biomass and silymarin production which has been investigated in the present study. Methods<...

In continuing search for effective treatments of cancer, the emerging model aims at efficient intracellular delivery of therapeutics into tumor cells in order to increase the drug concentration. However, the implementation of this strategy suffers from inefficient cellular uptake and drug resistance. Therefore, pH-sensitive nanosystems have recently been developed to target slightly acidic extr...