Snail galactan

Since this maiui.script was completed, the zone-electrophoretic behavior of several neutral polysaccharides (including yeast mannan and snail galactan) on fiberglass strips (and on silk) has been described in detail by K. W. Fuller and D. H. Northcote [Biochem. J. (London), 64, 657 (1956)]. 

H. Bretting, N. F. Whittaker, E. A. Rabat, K. Konigsmann-Lange, and H.-J. Thiem, Chemical and inmunochemical studies on the structure of four snail galactans, Carbohydr. Res., 98 (1981) 213-236. 

Several other polysaccharides show a stepwise response similar to that of snail galactan, in that polymeric products decreasing in size were isolated from successive Barry degradations. In these polysaccharides also, the periodate-resistant residues are assembled without interruption over large regions of a highly ramified molecule. 

Occurs in agar-agar, chagual gum, red algae, flaxseed mucilage and a snail galactan. The L-galactose obt. from the hydrolysates of these polysaccharides can be freed from the enantiomer present by fermentation of the D-form. 

Duarte and Jones studied the galactan from the snail Strophocheilus oblongus, and obtained a polymeric residue in a yield of 8% after... 

Some Structural Studies on the Galactan from the Albumen Glands of the Snail, Strophocheilus oblongus," J. H. Duarte and J. K. N. Jones, Carbohydr. Res., 16 (1971) 327-335. 

Sugars usually occur in nature as polysaccharides containing one or other enantiomeric form, D or L. There are however, exceptions, fortunately few, such as the galactan (i.e. poly-galactose) from snails which produces both D- and L-galactose upon hydrolysis (93). 

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