The sequence of monomers in the polymer.
If you are lucky enough your browser support old JAVA and proper setting of JAVA option, you will see the window like below.
If you can not see this window, please check browser's JAVA option or try other browser. Eventhough you fail. Give up this old IAVA verson. (This Applet is still running with Mac with FireFox browser. 2011.11.15)