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3 protocols using tris hcl

1

Purification of Plant-Produced Antibody Fragments

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Infiltrated N. benthamiana leaves were extracted with 1X PBS, pH 7.4 using a blender (JSR, Gongju-si, Korea) and centrifuged (Thermo Scientific, Massachusetts, USA) at 26,000 g for 30 min. The supernatant was filtered with a 0.45 µm membrane filter (Pall Corporation, New York, USA) and loaded onto a protein-A affinity column. The column was washed with ten-column volumes of PBS pH 7.4. The bound protein was eluted with 0.1 M glycine (Vivantis, Shah Alam, Malaysia), pH 2.7, and rapidly neutralized to pH 7.4 with 1.5 M Tris–HCl (Vivantis, Shah Alam, Malaysia), pH 8.8. The purified plant-produced VHH-αNTX-Fc and VHH-PLA2-Fc antibody was analyzed using SDS-PAGE and immunoblot analysis.
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2

Carbohydrate-based Analytical Procedures

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Maltooligosaccharide (G1-4), soluble potato starch, corn starch, bovine serum albumin and ampicillin sodium salt were purchased from Sigma-Aldrich (St. Louis, MO, USA). Tryptone and yeast extract were obtained from Difco (Bacton Dickinson and company, Sparks, MD, USA). β-CD was purchased from AppliChem (Darmstadt, Germany). Standard maltitol and D-sorbitol were obtained from TCI (Toshima, Kita-ku, Tokyo, Japan). Aquacide II, methanol, isopropanol, ethyl acetate, acetonitrile, HPLC-grade water, potassium dihydrogen phosphate, dipotassium phosphate and TLC silica gel 60 F254 glass plates (20 cm in height) were purchased from Merck (Darmstadt, Germany). IPTG, glycine and Tris-HCl were obtained from Vivantis (Sendirian Berhad, Shah Alam, Malaysia). Sulfuric acid was obtained from Carlo Erba Reagents (Val de Reuil, France). The commercial glucose oxidase kit was obtained from Human mit-diagnostics GmbH (Idstein, Germany). Other chemicals used were of an analytical grade.
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3

Biochemical Analysis of Experimental Samples

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Materials used in this study were ammonium sulfate (Merck, Denmark), agarose (Himedia, India), de Man Rogosa Sharpe Broth (Himedia, India), Luria Bertani (Himedia, India), Hematoxylin-Eosin, formalin 4%, ethanol absolute (Merck, Denmark), xylol, paraffin, glycerin 99.5%, NaCl (Merck, Denmark), and TCA, TBA, BHT, Tris-HCl (Vivantis, USA).
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