Abstract
Two kinds of band-like cellulose assemblies, coarse and densestructures, are produced in Hestrin–Schramm medium at 4 °Cusing smooth colonies isolated from Acetobacter xylinumATCC23769, whereas ribbon cellulose assemblies are produced by the samecoloniesat 28 °C. The dense and the coarse band-like assembliesconsist of many strand-like cellulose entities (‘strands’) and areextruded perpendicularly to the long axis of the bacterial cell. In an earlystage of incubation at 4 °C, the dense band-like assembly isproduced and the number of strands decreases gradually with increasingincubation time at 4 °C, probably because the number of activeTC subunits decreases as a result of the low-temperature shock for thebacteria.In contrast, the coarse band-like assembly is clearly observed after about 1h of incubation at 4 °C. The number of strands inthe coarse band-like assembly is about one third of that of the dense band-likeassembly and does not change during the incubation time of about 6h. In the selected-area electron diffraction (ED) experiment, thedense band-like assembly gives crystalline reflections corresponding to thecellulose II type crystal, while the coarse band-like assembly does not giveanycrystalline reflections under the same ED conditions.
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Hirai, A., Tsuji, M. & Horii, F. TEM study of band-like cellulose assemblies produced by Acetobacter xylinum at 4 °C. Cellulose 9, 105–113 (2002). https://doi.org/10.1023/A:1020195205030
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DOI: https://doi.org/10.1023/A:1020195205030