Biotechnology Bulletin ›› 2015, Vol. 31 ›› Issue (3): 161-164.doi: 10.13560/j.cnki.biotech.bull.1985.2015.04.023

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Screening of Nattokinase Producing Strain and Characterazation of Nattokinase

Zhao Zhonglin1 Li Shuying2 Nie Ying2 Li Yan3 Yuan Chao1 Tang Xuanming2   

  1. (1. College of Sciences,Henan Agricultural University,Zhengzhou 450002;2. Institute of Agro-products Processing Science and Technology,Chinese Academy of Agricultural Sciences,Beijing 100193;3. School of Food and Biological Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002)
  • Received:2014-09-05 Online:2015-03-16 Published:2015-03-16

Abstract: To develop new kinds of natto health care products with specific physiological activity, a nattokinase high-yield strain was isolated and used for natto production. The characteristics and nattokinase activities of the isolated strain were compared with other 3 kinds of natto strains. Results showed that the natto products of munber 5 strain have golden color and soy sauce flavor, and have the best length of natto wire drawing. The result of fermentation time showed that nattokinase content reached the maximum value at 17 h.

Key words: nattokinase, screen, enzyme activity, characteristic