Table 5 Possible origin of the detected linked residues
From: Recalcitrant carbohydrates after enzymatic hydrolysis of pretreated lignocellulosic biomass
Residue | Linkage type | Model compounda | Putative enzyme involved |
|---|---|---|---|
Glucopyranosyl | Terminally linked (1) | Pullulan | Eg/Cbh/Bgl |
3 linked (2) | Lichenan | Ace/Fe | |
4 linked (3) | Glucan | Eg/Cbh/Bgl | |
6 linked (4) | Pullulan, stachyose | Ace/Fe/Aabn | |
4,6 linked (5) | Xyloglucan | Eg/Cbh/Bgl | |
Xylopyranosyl | 4 linked (6) | Xylan | Xyl/Bxl |
2,4 linked and 3,4 linked (7, 8) | Arabinoxylan | Abn/Xyl/Bxl | |
Arabino(pyra/fyra)nosyl (Arap/Araf) | Terminally linked (9, 10) | Arabinose | Abn |
4-linked Arap or 5-linked Araf (11) | Debranched arabinan | Aabn | |
Mannopyranosyl | Terminally linked (12) | Mannose | Bman |
2 linked and 6 linked (13, 15) | Acetylationb | Ace/Fe | |
4 linked (14) | Mannan | Bman | |
Galactopyranosyl | Terminally linked (16) | Galactose | Bgal |
2,4 linked and 3,4 linked (17, 18) | Galactanb | AGal/Bgal |