The chemical structure of cyclic β-(1→6)-β-(1→3)-glucan of <i>Bradyrhizobium japonicum</i> strain USDA 110, as indicated in <b>Rolin, D. B., <i>et al</i>.</b> (1992) "Structural studies of a phosphocholine substituted β-(1→3); (1→6) macrocyclic glucan from <i>Bradyrhizobium japonicum</i> USDA 110." <i>Biochim. Biophys. Acta</i> <b>1116:</b>215–25. <a class="external mw-magiclink-pmid" rel="nofollow" href="//www.ncbi.nlm.nih.gov/pubmed/1610877?dopt=Abstract">PMID 1610877</a> where it is noted that the location of the phosphocholine residue is arbitrary.
<a href="//commons.wikimedia.org/wiki/User:Ninjatacoshell" title="User:Ninjatacoshell">Ninjatacoshell</a>
<span class="int-own-work" lang="en">Own work</span>