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2 protocols using recombinant peptide n glycosidase f

1

Glycoprotein Sample Preparation Protocol

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Ammonium formate was purchased from Fluka
(Steinheim, Germany). Acetic acid, 2-aminobenzoic acid (2-AA), 2-picoline
borane (2-PB), ammonium acetate, ammonium bicarbonate (ABC), bovine
serum albumin (BSA), cesium iodide, cytochrome C (cyt C), dimethyl
sulfoxide (DMSO), disodium hydrogen phosphate dihydrate, Tris (2-carboxyethyl)phosphine
hydrochloride (TCEP), chloroacetamide (CAA), dithiothreitol (DTT),
iodoacetamide (IAA), nonidet P-40 substitute (NP-40), potassium dihydrogen
phosphate, sodium chloride, super-DHB, and urea were obtained from
Sigma-Aldrich (Steinheim, Germany). Formic acid (FA) and 2-propanol
(IPA) were supplied by Riedel-De Haen (Seelze, Germany). The HPLC-grade
acetonitrile (ACN) was purchased from Biosolve (Valkenswaard, The
Netherlands). TrifluoroAcetic acid (TFA) was obtained from Merck (Darmstadt,
Germany). Recombinant Peptide-N-Glycosidase F (PNGase F) was purchased
from Roche Diagnostics or Promega. Milli-Q water was provided by Purelab
ultra (ELGA Labwater, Ede, The Netherlands). EndoPro purified fromAspergillus nigerwas provided by DSM formulated in
50% glycerol.
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2

Peptide-N-Glycosidase F Protocol

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Nonidet P-40 substitute (NP-40), potassium dihydrogenphosphate (KH2PO4), disodium hydrogen phosphate dihydrate (Na2HPO4 × 2 H2O), sodium chloride (NaCl), 50 % sodium hydroxide (NaOH), 1-hydroxybenzotriazole 97 % (HOBt) and super-DHB (9:1 mixture of 2,5-dihydroxybenzoic acid and 2-hydroxy-5-methoxybenzoic acid, sDHB) were obtained from Sigma-Aldrich (Steinheim, Germany). Potassium hydroxide (KOH), sodium dodecyl sulfate (SDS), analytical grade ethanol and trifluoroacetic acid (TFA) were purchased from Merck (Darmstadt, Germany). HPLC-grade acetonitrile (ACN) was purchased from Biosolve (Valkenswaard, The Netherlands) and 1-ethyl-3-(3-(dimethylamino)propyl)carbodiimide (EDC) hydrochloride was obtained from Fluorochem (Hadfield, UK). Recombinant peptide-N-glycosidase F (PNGase F) was purchased from Roche Diagnostics (Mannheim, Germany). From a Millipore Q-Gard 2 system (Amsterdam, The Netherlands) maintained at ≥ 18 MΩ milli-Q water (MQ) was generated.
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