Agricultural and Biological Chemistry
Online ISSN : 1881-1280
Print ISSN : 0002-1369
ISSN-L : 0002-1369
Milk-clotting Enzyme from Microorganisms
Part IX. Reaction of Diazo-H-tetrazole on Mucor-rennin (Crystalline Milk-clotting Enzyme)
Juhyun YUGakuzo TAMURAKei ARIMA
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1971 Volume 35 Issue 9 Pages 1398-1401

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Abstract
The milk-clotting activity of Mucor-rennin (Milk clotting enzyme of Mucor pusillus Lindt) was inhibited by reaction of diazo-l-H-tetrazole accompanied with increase of the value of the absorbance of biazo.histidine at 480 nm. The activity did not remain when the absorbance reached 50% of maximum value. It is concluded from these results that one mole of histidine in 2 moles of histidine contained in the enzyme has a relation to active center.
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