This worksheet calculates the isoelectric point of a protein. I think that it will be possible to make the worksheet do the calculations faster. Fell free to make it better, it is not protected by any password. I would like to be able to simply type in an amino acid sequence and then let the worksheet do the rest (so you may see another version soon). Please give copies of the worksheet to everybody you think may use it, but don't charge money for it!!! You may also modify your personal copy, customising it to your needs. BUT please give the original copy to other interested Mac users.
Input:
Simple fill in the number of the specified charged amino acids in the boxed cells. Also fill in the pK value of the amino group in the N-terminus and the pK value of the carboxyl group in the C-terminus. You may find the values in the table on page one in the worksheet.
Output:
You are able to copy and print the results. The result consist of the total number of negative and positive charges at pH values ranging from 1-13 (with 0.5 pH units between each). These as well as their sum are also plotted in a chart as a function of the pH value.
NB. The worksheet is made with excel version 3.0a.
