galactose/galactose oxidase assay information needed

M. Deshpande mdeshpan at
Fri May 5 10:22:26 EST 1995

We are using YSI biochemistry analyser (2700) for simultaneous analysis 
of glucose and galactose.

On 3 May 1995, larson eric wrote:

> bipin dalmia <dalmiabk at> writes:
> >hi: i need to set-up an assay for galactose using the galactose oxidase,
> >peroxidase method. would need any references to such an assay. also, does
> >anyone know if a commercial kit is available with preweighed enzymes etc.
> >similar to the one from Sigma for glucose assay? Sigma does not have a
> >galactose kit. if you can send any information, i would appreciate very
> >much. either post, or e-mail to dalmiabk at thanx.
> =============
> The Worthington enzyme catalog lists a procedure for assaying Galactose
> Oxidase.  The book lists a review (Malmstron et al. (1975) The Enzymes,
> XIIB, 3rd. Ed. (Boyer, P. D., ed.) pg 527).  
> I suggest starting here (either the Worthington catalog or The Enzymes).
> The procedure is fairly easy, but I don't know if anyone still produces the
> kits (the Worthington catalog states they do, but it is an old catalog -- if
> you've ever seen a Wothington catalog you'd understand why people save
> these as reference works).
> I've done the assay -- it's relatively straightforward (typical assay with
> lots of additions).
> I do suggest caution if you're going to have glycerol around.  There is a
> very low activity with glcyerol (makes glyceraldehyde) that can futz up
> long-term incubations (easy to assay this activity -- just have 20%
> glycerol in your assay and you should get substantial activity without
> galactose being present.
> Ship me a fax number and I'll send you the two pages of the Worthington
> catalog (and an ancient page of typed notes -- which I have no intention
> of typing in this evening).
> -- 
> Eric Larson                  | University of Illinois at Urbana-Champaign
> USDA/Agronomy                | 190 PABL; 1201 W. Gregory; Urbana, IL 61801
> elarson at     | Voice 217.244.3079  Fax 217.244.4419
> Fidonet: 1:233/4.1           | My opinions are my own, but correct :-) 

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