What output arguments exist for the ISOELECTRIC function in the Bioinformatics Toolbox 1.1 (R14)?

I am having difficulty understanding the results that I obtain when using the ISOELECTRIC function from the Bioinformatics Toolbox 1.1 (R14). In particular, the documentation accessed by typing either of the following commands at the MATLAB prompt:

help isoelectric

doc isoelectric

fails to describe the output arguments for the ISOELECTRIC function.

Answer 1

[MathWorks Support Team]

This bug has been fixed in Release 14 Service Pack 3 (R14SP3). For previous product releases, read below for any possible workarounds:

Information detailing the output arguments of the ISOELECTRIC function is missing in the documentation associated with the Bioinformatics Toolbox 1.1 (R14).

The ISOELECTRIC function returns the following output arguments:

 [pI Charge] = isoelectric(...)

where "pI" is the isoeloectric point, which is the estimated pH at which the net charge of the protein would be zero; and "Charge" indicates what the expected charge would be for the protein at a specific pH.