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https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/18850
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| 題名: | Degradation of chitin and production of bioactive materials by bioconversion of squid pens |
| 作者: | Wang, San-Lang;Yang, Chiann-Wen;Liang, Tzu-Wen;Peng, Juo-Hua;Wang, Chuan-Lu |
| 貢獻者: | 淡江大學化學學系 |
| 關鍵詞: | Serratia marcescens;Protease;Chitosanase;Squid pen wastes;Deproteinization |
| 日期: | 2009-09 |
| 上傳時間: | 2013-02-27 09:31:37 (UTC+8) |
| 出版者: | Kidlington: Pergamon |
| 摘要: | Serratia marcescens TKU011, a protease- and chitosanase-producing bacterium, the optimized condition for protease and chitosanase production was found after the media were heated at 121 °C for 120 min and the culture was shaken at 25 °C for 5 days in 100 mL of medium containing 1% squid pen powder (SPP) (w/v), 0.1% K2HPO4, and 0.05% MgSO4. An extracellular metalloprotease with novel properties of solvent stable, and alkaline was purified from the culture supernatant of S. marcescens TKU011 with squid pen wastes as the sole carbon/nitrogen source. The enzyme was a monomeric protease with a molecular mass of 48–50 kDa by SDS–PAGE and gel filtration chromatography. The optimum pH, optimum temperature, pH stability, and thermal stability of TKU011 protease were 8, 50 °C, pH 5–11, and <40 °C, respectively. Besides protease and chitosanase, with this method, deproteinization of squid pen for β-chitin, the production of peptide and reducing sugar may be useful for biological applications. |
| 關聯: | Carbohydrate Polymers 78(2), pp.205-212 |
| DOI: | 10.1016/j.carbpol.2009.03.020 |
| 顯示於類別: | [化學學系暨研究所] 期刊論文
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