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2 protocols using pseudomonas fluorescens lipase

1

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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2

Enzymatic Peptide Synthesis Using Magnetic Field

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L-Phenylalanyl-L-phenylalanine and N-(9-Fluorenylmethoxycarbonyl)-L-phenylalanine were obtained from Bachem GmbH (Weil am Rhein, Germany). All other chemicals, including FeCl2·4H2O, FeCl3, and Pseudomonas fluorescens Lipase (≥20,000 U/mg) were purchased from Sigma-Aldrich (Saint Louis, MO, USA). All chemicals were employed without further purification. Ultra-pure water was prepared with a Zeneer Power I Scholar-UV (Full Tech Instruments, Rome, Italy) apparatus. The external magnetic field was generated by using a neodymium-based magnet (volume = 39.270 cm3, magnetization quality = N5, magnetic strength = 1.42–1.47 T).
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