D-P-Glucans

CelIulose.-Most biologists know that cellulose (l->4-linked P-D-glucan) is a polysaccharide component of all primary and secondary cell walls. Indeed, plant cell walls are... 

Naturally, very long T,c values are expected for solids as viewed from the expected correlation time at the low temperature side of the T c minimum (0.1-0.2 s) as shown in Figure 1. Indeed, their values turns out to be the order of 10-30 s for carbon sites in the absence of internal fluctuations as in polysaccharides such as (1 — 3)-p-D-glucan and (1 —> 3)-p-D-xylan,46 8 fibrous proteins such as collagen49 and silk fibroin,50 free and metal-complexed ionophores,51 or in some instances up to 1000 s as in crystalline polyethylene.52... 

Figure 16 Conversion diagram for (1 — 3)-p-D-glucans by a variety of physical treatments (based on Refs. 48 and 119).

M. Hrmova, R. de Gori, B. J. Smith, A. Vasella, J. N. Varghese, and G. B. Fincher, Three-dimensional structure of the barley p-D-glucan glucohydrolase in complex with a transition state mimic, J. Biol. Chem., 279 (2004) 4970 1980. 

Kiho, T., Katsuragawa, M., Nagai, K., Ugai, S. and Haga, M. (1992) Structure and antitumor activity of a branched (l-3)-p-D-glucan from the alkaline extract of Amanita muscaria. Carbohydr. Res. 224,237-243. 

Dubourdieu, D. and Ribereau-Gayon, P. (1981). Structure of the extracellular p-D-glucan from Botrytis cinerea. Carbohydr. Res. 93, 294 299. 

Nakanishi, I., Kimura, K., Kusui, S., and Yamazaki, E. (1974). Complex formation of gel-forming bacterial (l,3)-P-D-glucans (curdlan-type polysaccharides) with dyes in aqueous solution. Carbohydr. Res. 32 47-52. 

P-Glucanase Hydrolysis of (3-1,3- and (3- 1,4-linkages in p-D-glucans, yielding oligosaccharides and glucose. 

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