Jussi Kankare Jussi.Kankare at
Fri Sep 27 05:07:09 EST 1996

Dear Netters,

I'm trying to crystallize a protein and would therefore like
to have my sample as homogeneous as possible. However when the
purity of the sample is checked with SDS-page the gel shows a 
major and small minor band just beneath the major one. I have 
not purified the sample myself but the persons who have done 
the work claim that the sample is pure but the protein just has
the property that it shows two bands in SDS-page ?!? I would naturally
think that this means that the sample is NOT homogeneous. What could 
cause this sort behaviour of a protein or is there simply a need for
repurifying the protein.  

Best Regards,


	Jussi Kankare
	Department of Biosciences, 
	Division of Genetics
	P.O. BOX 56 (Viikinkaari 5)
	00014 University of Helsinki, Finland
	phone: 	+358-0-7085 9579
	fax:	+358-0-7085 9098 
	email: Jussi.Kankare at

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