Drawing a protein (Biostar #6172)

This post is my answer for this question on Biostar:Drawing a protein:
Dear all I often find protein's image like this (...) Do you know if there's a program to draw them (I mean circles with letters).

I wrote a Java-Swing application named WirePeptide displaying a draggable peptide. This application is available on github at https://github.com/lindenb/jsandbox/blob/master/src/sandbox/WirePeptide.java. The user can save the image as PNG, SVG and HTML+Canvas.

Compile & Run

cd jsandbox
ant wirepeptide
java -jar dist/wirepeptide.jar

Result (Canvas)

That's it,

Pierre