MadSci Network: Biochemistry

Re: What is the optimum pH for potato catalase?

Date: Wed Apr 26 10:27:30 2000
Posted By: Karl A. Wilson, Faculty (Professor), Biological Sciences, S.U.N.Y. at Binghamton (Binghamton University)
Area of science: Biochemistry
ID: 955486083.Bc

The archives response I believe you are referring to (876505725.Bc) noted 
the pH optimum for beef catalase.  Unfortunately, I have not been able to 
track down a reference for the pH optimum of potato catalase - quite 
surprising given the popularity of this enzyme in teaching lab experiments. 
 The pH optimum for a plant catalase such as potato may very well be 
different, and could depend upon other factors in the assay such as the 
type of buffer used, the ionic strength, etc.  A few references for 
bacterial catalases I found did cite a wide range of pH optima.  So I'm not 
surprized that you find a pH optimum for potato catalase that is different 
from 7.0!  

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