The formation of beta-beta structures in lignin biosynthesis--are there two different pathways?
Based on results from 2D NMR studies, both pinoresinol and secoisolariciresinol structures were found to be present in native lignin from spruce wood as well as in spruce kraft lignin and residual kraft pulp lignin. These two structures constitute the major types of beta-beta inter-unit linkages present in spruce lignin, but their formation in the lignin polymer may follow different pathways leading to their different bonding patterns with the rest of the lignin polymer. The mechanisms involved are discussed.
Department of Fibre and Polymer Technology, KTH, Royal Institute of Technology, SE-100 44 Stockholm, Sweden. liming@pmt.kth.se
Liming
L
Zhang
Gunnar
G
Henriksson
Göran
G
Gellerstedt
D002072:Butylene Glycols / Q000737:chemistry; D002236:Carbohydrate Conformation; D002241:Carbohydrates / Q000032:analysis; D005663:Furans; D017705:Lignans / Q000737:chemistry; D008031:Lignin / Q000096:biosynthesis* / Q000737:chemistry; D008956:Models, Chemical; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*; D014934:Wood
D002072:Butylene Glycols; D002241:Carbohydrates; D005663:Furans; D017705:Lignans; D008031:Lignin; C060283:secoisolariciresinol; C103298:pinoresinol