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2 protocols using rhizomucor miehei lipase

1

Immobilization of Enzymatic Catalysts

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The reagent 1-ethyl-3-[3-dimethylaminopropil]carbodiimide (EDAC) was purchased from Alfa Aesar (Karlsruhe, Germany). Ethylenediamine (EDA), sodium borohydride, sodium periodate, 2,4,6-trinitrobenzenesulfonic (TNBS) acid solution, Schiff’s reagent, all dextran polymers (dextran sizes ranged from 1.5 kDa to 40 kDa), p-nitrophenyl butyrate (pNPB), epichlorohydrin, dithiothreitol (DTT) and d,l-cysteine were acquired from Sigma (St. Louis, MO, USA). 6-Nitro-3-phenylacetamidobenzoic acid (NIPAB) was purchased from Fluorochem (Hadfield, UK). Octyl–Sepharose 4BCL (OA) was purchased from GE Healthcare (Uppsala, Sweden). Toyopearl HW65C was purchased from Tosoh Bioscience GmbH. (Griesheim, Germany). The enzymes Candida antarctica lipase B (CALB), Thermomyces lanuginosus lipase (TLL), and Rhizomucor miehei lipase (RML) were kindly donated by Novozymes (Bagsvard, Denmark). Penicillin G acylase (PGA) was kindly donated by Antibioticos S.A. (León, Spain). All other reagents were analytical or HPLC grade. Enzymatic assays were carried out on a V-730 spectrophotometer from JASCO Analitica Spain S.L. (Madrid, Spain).
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2

Comparative Evaluation of Lipase Preparations

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Commercially available lipases were used as follows: (i) Immobilized lipases:
Candida antarctica lipase type B immobilized on acrylic resin (CAL-B, 7,300.0 U/g), Thermomyces lanuginosus lipase immobilized on immobead-150 (TLL, 250.0 U/g), Rhizopus oryzae lipase immobilized on immobead-150 (ROL, 340.0 U/g), Pseudomonas fluorescens lipase immobilized on immobead-150 (PFL, ≥ 600 U/g), Pseudomonas fluorescens lipase immobilized in Sol-Gel (AK, ≥ 30 U/g), Pseudomonas fluorescens lipase immobilized in Sol-Gel on pumice (AK, ≥ 8.0 U/g) and Amano lipase PS from Burkholderia cepacia immobilized on diatomaceous earth (PS-IM, ≥ 500 U/g) were acquired from Sigma-Aldrich®, Rhizomucor miehei lipase immobilized in anionic resin (RML, 150.0 U/g) was purchased from Novozymes ® . (ii) Unsupported lipase preparations: Pseudomonas fluorescens lipase (AK, 22,100.0 U/g), Penicillium camemberti lipase (G, 50.0 U/g), lipase from Rhizopus niveus (RNL, ≥ 1.5 U/mg), Amano lipase from Mucor javanicus (MJL, ≥ 10,000 U/g) and lipase from Aspergillus niger (ANL, 200 U/g) were acquired from Sigma-Aldrich ® . Porcine pancreas lipase (PPL, 46.0 U/g solid), and Candida rugosa lipase (CRL, 1.4 U/g) were obtained from Sigma-Aldrich ® . (iii) Esterase, immobilized in Eupergit ® C from hog liver (~200 U/g) was obtained from Sigma-Aldrich ® .
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