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5 protocols using naclo4 h2o

1

Synthesis of Inorganic Compounds

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Na2WO4•2H2O (≥99 %), (COOH)2•2H2O (≥99 %), Na2SO4•10H2O (≥99 %), NaClO4•H2O (99.99 %), Na3PO4 (96 %) were purchased from Sigma Aldrich as used as received. 3M HCl was diluted from 37 % HCl solution (Merck). Distilled water was used throughout the experiments.
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2

Comprehensive Chemical Reagents Procurement

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MgCl2•6H2O (98%), NaCl (98%), NaClO4•H2O (98%), NaF (99%), Mg(NO3)2•6H2O, KSCN (99%), LiNO3 (99%) and D2O (99.9 atom% D) were obtained from Sigma-Aldrich (Diegem, Belgium). CaCl2•2H2O (99.5%), NaNO3 (99%), Na2SO4 (99%), Ca(NO3)2•4H2O (99%), KNO3 (99%), NH4NO3 (99%) and HNO3 (65%) were purchased from Chem-Lab (Zedelgem, Belgium). KCl (99.5%) and NaI (99.5%) were purchased from AppliChem (Darmstadt, Germany) and LiCl (99%) from Fisher Chemical (Loughborough, UK). CsCl (99%), NaBr (99.5%), NH4Cl (99.5%), H2SO4 (96%), HClO4 (70%), HCl (37%) and 1,4-dioxane (99.9%) were obtained from Acros Organics (Geel, Belgium). The silicone solution in isopropanol was purchased from SERVA Electrophoresis GmbH (Heidelberg, Germany). All chemicals were used as received without further purification.
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3

Metalloprotein Purification and Characterization

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Acetonitrile (MeCN), HCl (trace metal grade), NaClO4 H2O, ZnSO4·7H2O, 4-(2-pyridylazo)resorcinol (PAR), and Triton X-100 were from Merck Millipore. Tris(2-carboxyethyl)phosphine hydrochloride (TCEP), tryptone, yeast extract, LB Broth, agar, agarose, isopropyl-β-D-1-thiogalactopyranoside (IPTG) and sodium dodecyl sulfate (SDS) were purchased from Lab Empire. Ampicillin, chloramphenicol, 1,4-dithiothreitol (DTT) and Tris base were from Roth, pTYB21 vector and chitin resin from New England BioLabs, Chelex 100 resin from Bio-Rad, 4-(2-hydroxyethyl)piperazine-1-ethanesulfonic acid sodium salt (HEPES), 5,5ʹ-dithiobis-(2-nitrobenzoic acid) (DTNB) from TCI Europe. To eliminate trace metal ion contamination all pH buffers were treated with Chelex 100 resin (Bio-Rad) and degassed over 2 h prior to use. For the culture of E. coli, Luria–Bertani (LB) medium and agar plates were used.
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4

Purification and Preparation of Solutions

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Distilled water was further purified by passing it through a mixed bed of ion-exchanger (R3-83002, M3-83006, Bioblock Scientific, Illkirch, France) and activated carbon (Bioblock Scientific ORC-83005) and was de-oxygenated by CO2- and O2-free argon (Sigma Oxiclear cartridge) before use. All the stock solutions were prepared in spectroscopic grade dimethylsulfoxide (DMSO, Bioreagent for Molecular Biology, >>99.9%, Sigma) by weighing solid products using a XA105 Dual Range (0.01/0.1 mg–41/120 g) balance Mettler Toledo (Viroflay, France) and the complete dissolution was achieved using an ultrasonic bath. The ionic strength was maintained at 0.1 M with sodium perchlorate (NaClO4.H2O, Merck, p.a.), and all measurements were carried out at 25.0 ± 0.2 °C. CAUTION! Perchlorate salts combined with organic ligands are potentially explosive and should be handled in small quantities and with the adequate precautions [61 ].
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5

Synthesis of Coordination Compounds

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Chemicals were used as purchased without further purification: L-alanine (99.8%, Evonik), L-proline (>99%, Evonik), CuClO 4 •6H 2 O (98%, Sigma-Aldrich), AgClO 4 (97%, Sigma-Aldrich), NaClO 4 •H 2 O (99%, Merck), urea (99.5%, Grüssing).
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