Fine structure of polysaccharide microcrystals

Summary Negative staining showed the presence of microcrystals in various polysaccharides. Cellulose microcrystals from Valoniopsis, Vaucheria, and an unidentified tunicate had widths of 20, 27, and 30 Å, respectively. Mannan microcrystals from Acetabularia were 10x25 Å and were oriented in linear arrays with their long axis perpendicular to the array axis. dichotomosiphon and Caulerpa xylans had respective microcrystal widths of 22 and 24 Å. All microcrystals appeared as component part of microfibrils.