charge reads a protein sequence and writes a file (or plots a graph) of the charges to the amino acids within a window of specified length as the window is moved along the sequence.

Here is a sample session with charge:

% charge sw:hbb_human 
Protein charge plot
Output file [hbb_human.charge]:

Mandatory qualifiers (bold if not always prompted):

[-seqall] (seqall)

Sequence database USA.

-graph (xygraph)

Graph type.

-outfile (outfile)

Output filename.

Optional qualifiers:

-window (integer)

Window.

Advanced qualifiers:

-aadata (string)

Amino acid property data filename.

-plot (boolean)

Produce graphic.