食品科学 ›› 2009, Vol. 30 ›› Issue (5): 184-186.doi: 10.7506/spkx1002-6630-200905042

• 生物工程 • 上一篇    下一篇

牛乳中产耐高温蛋白酶嗜冷菌的分离及鉴定研究

刘 敏,曹志军,母智深,李艳梅   

  1. 内蒙古农业大学职业技术学院
  • 收稿日期:2008-04-10 修回日期:2008-06-25 出版日期:2009-03-01 发布日期:2010-12-29
  • 通讯作者: 曹志军 E-mail:czjczlal@126.com

Study on Isolation and Identification of Thermotolerant Protease-producing Psychrophiles in Milk

LIU Min,CAO Zhi-jun,MU Zhi-shen,LI Yan-mei   

  1. (Vocational and Technical College, Inner Mongolia Agricultural University, Baotou 014109, China)
  • Received:2008-04-10 Revised:2008-06-25 Online:2009-03-01 Published:2010-12-29
  • Contact: CAO Zhi-jun, E-mail:czjczlal@126.com

摘要:

本实验采用单一性底物平板分离法和Folin 法,通过观察蛋白酶水解圈大小和测定该酶活力,从牛乳中共获得10 株产耐高温蛋白酶的嗜冷菌。对菌体形态、染色反应、培养性状、生理生化性状进行系统研究。鉴定结果表明,上述10 个细菌菌株分别属于气单胞菌属(Aeromonas)、巴斯德氏菌属(Pasteurel l a )、黄杆菌属(Flavobacterium)、变形菌属(Proteus)、节杆菌属(Arthrobacter)、短杆菌属(Brevibacterium)、微球菌属(Micrococcus)、片球菌属(Pediococcus)、乳球菌属(Lactococcus)和明串球菌属(Trichococcus)。

关键词: 嗜冷菌, 耐高温蛋白酶, 分离, 鉴定

Abstract:

Through the determination of hydrolysis circle size and activity of protease, ten strains of psychrophile producing thermotolerant protease in milk were screened out by singleness-substrate plate separation and Folin methods. Based on their morphology, staining reaction and, cultural characteristics, physiological and biochemical characteristics, the ten strains were identified to belong to Aeromonas, Pasteurella, Flavobacterium, Proteus, Arthrobacter, Brevibacterium, Micrococcus, Pediococcus, Lactococcus and Trichococcus, respectively.

Key words: psychrophile, thermotolerant protease, isolation, identification

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