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276 Advances in textile biotechnology

Tamarind
xyloglucan

1. endo-(Xylo)glucanase/buffer/H 2O
2. NH HCO /NaCNBH /H O
3
2
4
3
HO
HO
OH OH
O O
HO O
OH O OH
x
OH OH
HO O O HO O OH
HO HO O HO NH 2
O HO O OH
O O
OH O O
O HO OH
O OH
OH
y
OH OH
OH OH
XGO–NH 2

Further chemistry

OH
OH
(XGO)O H
HO N
OH R
XGO–R
11.4 Chemo-enzymatic synthesis of amino-modifi ed xylogluco-
oligosaccharides (XGO-NH 2 ) and further derivatives (XGO-R) from
tamarind XG. Digestion of the polysaccharide produces a mixture of
oligosaccharides in the ratio 2 : 4 : 3 (Glc 4 Xyl 3 /Glc 4 Xyl 3 Gal/Glc 4 Xyl 3 Gal 2 )
(York et al., 1993). XGO-NH 2 and diverse XGO-R compounds are
substrates for XET, which are incorporated into XG polysaccharide
(see Fig. 11.3).

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