29-mer glycogen with 2 branches.  Reinforced model has additional links at selected possible hydrogen bonding sites.  Works well for teaching if printed 2x.  The PDB is derived from the 40-mer glycogen generated using SWEET2 at http://www.biotopics.co.uk/jsmol/glycogen.html by deleting a few residues on each branch and at the beginning and end of the main chain.  This simplified printing greatly.