The chemical structure of cyclosophorotetracosaose or cyclic β-(1→2)-glucan 24-mer of <i>Agrobacterium</i> and <i>Sinorhizobium</i> species, as indicated in <b>Hisamatsu, M., <i>et al</i>.</b> (1983) "Structural studies on cyclic (1→2)-β-d-glucans (cyclosophoraoses) produced by <i>Agrobacterium</i> and <i>Rhizobium</i>." <i>Carbohydrate Research</i> <b>121:</b>31–40<span class="error">Error: Bad DOI specified!</span>. Degree of substitution by <i>sn</i>-1-phosphoglycerol is variable (see <b>Miller, K. J., Gore, R. S., &amp; Benesi, A. J.</b> (1988) <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC211492/">"Phosphoglycerol Substituents Present on the Cyclic P-1,2-Glucans of <i>Rhizobium meliloti</i> 1021 Are Derived from Phosphatidylglycerol."</a> <i>J. Bacteriol.</i> <b>170 (10):</b>4569–4575).
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