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  • Journal
    Digital Access Ann Rev v. 1-, 1980-
    Print Access Request
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    Stored offsite. Please request print.
    v. 1-17, 19-28, 1980-96, 1998-2008.
    27
  • Article
    Rickert WS, McBride-Warren PA.
    Can J Biochem. 1976 Feb;54(2):120-9.
    The reaction of Mucor miehei protease with concanavalin A was followed by a turbidimetric assay in the pH range 5-8. At pH 4.0, no turbidity developed but binding of the enzyme to concanavalin A could be demonstrated by gel filtration. Two fractions of apparent molecular weight 65000 and 52000 were isolated, the 65000 molecular weight species apparently representing a protomer of concanavalin A (24000) bound to the enzyme. An analysis of the circular dichroism spectrum of this complex suggested that protomer binding results in a conformational change in the enzyme which is associated with a 30% increase in proteolytic activity. At pH 6.0, the enzyme was strongly bound to columns of concanavalin A Sepharose but could be removed by including alpha-methyl D-glucoside and NaC1 in the elution buffer. Some column degradation occurred at room temperature but was not detectable at 4 degrees C where rapid elution of the enzyme resulted in a greater than 90% yield of highly active protein. Periodate-oxidized Mucor miehei protease and Mucor renin did not react with concanavalin A and were not bound to the affinity column.
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