how to calculate the molar absorption coefficient of a protein?

Roger Murphy murphy_r at
Thu Jun 10 22:29:06 EST 1999

Sure, go to the ExPassy web site and select the proteomics tools options.  
There you can either load in your own sequence (paste from a text file) or a 
database number if the protein of interest is known, and calculate all sorts 
of physicochemical parameters, using a number of tools.



In article <7jm7qv$ing$1 at>, "Bob" <robdebob at> 
>Is there any web site that would calculate the absorption coefficient of a
>protein on the basis of the number of tryptophans, tyrosins, Phe, disulfide
>Or if not, what is the formula?
>Thanks, Rob

Roger Murphy, Ph.D.
Biological Production Facility
Ludwig Institute for Cancer Research
Austin & Repatriation Medical Centre
Studley Road,
Heidelberg,  Vic. 3084

Tel  61-3-94965463
Fax  61-3-94965436
Email Roger.Murphy at

More information about the Proteins mailing list