公开(公告)号：US3804717A

公开(公告)日：1974-04-16

申请号：US19096271

申请日：1971-10-20

申请人： MEIJI SEIKA KAISHA

发明人： KOAZE Y ,  NAKAJIMA Y ,  HIDAKA H ,  YOSHIDA K ,  ITO J ,  NIWA T ,  ADACHI T ,  UEDA M ,  NIIDA T ,  SHOMURA T

IPC分类号： C12N9/28 ,  C12N9/26 ,  C12P19/14 ,  C12D13/10

CPC分类号： C12P19/14 ,  Y10S435/886 ,  Y10S435/887 ,  Y10S435/889 ,  Y10S435/898

摘要： THIS INVENTION RELATES TO PRODUCING A NEW AMYLASE BY CULTIVATING A STRAIN OF THE PARTICULAR SEVEN SPECIES OF STREPTOMYCES; STREPTOMUCES ALUBUS, STREPTOMYCES AUREOFACIENS, STREPTOMYCES HYDROSCOPICUS, STREPTOMYCES HYDROSCOPCUS VAR. ANGUSTOMYCETICUS, STREPTOMYCES VIRIDOCHROMOGENES, STREPTOMYCES FLAVUS AND STREPTOMYCES TOSAENSIS. THESE NEW AMYLASES PRODUCED BY THE ABOVE PARTICULAR SPECIES, RESPECTIVELY HAVE SOME ENZYMATIC ACTIVITIES AND CHARACTERISTICS WHICH ARE MUCH MORE USEFUL AND ADVANTAGEOUS IN PRODUCING A HIGHER YEILD OF MALTOSE FROM STARCH AND AMYLOSE, AS COMPARED TO THE USE OF THE KNOWN AMYLASES. THE STARCH HYDROLYZATE WHICH IS OBTAINED BY REACTING THE NEW AMYLASE WITH STARCH IN AQUEOUS DISPERSION CONTAINS A PREDOMINANT PROTORTION OF MALTOSE AND IS USEFUL AS A NATURAL SWEETENING MATERIAL, FURTHER, THIS STARCH HYDROLYZATE MAINLY COMPOSED OF MALTOSE IS CONVERTED INTO A MIXTURE OF SUGAR ALCOHOLS MAINLY COMPOSED OF MALTITOL BY HYDROGENATING IN THE PRESENCE OF A NICKEL CATALYST.