NMR elucidation of nonproductive binding sites of lignin models with carbohydrate-binding module of cellobiohydrolase I

Table 1 Molecular weight parameters of ¹³C-labeled and unlabeled β-O-4 lignin oligomer model compounds

Lignin models	Chain length	M_n	M_w	M_w/M_n	DP^a
Compound 4^(Arβ) (¹³C-labeled aromatic rings and β positions)	Long	843	923	1.095	4.70
	Short	480	520	1.083	2.64
Compound 4^(α) (¹³C-labeled α positions)	Long	750	918	1.224	4.67
Compound 4^(α) (¹³C-labeled α positions)	Short	531	614	1.156	3.12
Compound 4^(m) (¹³C-labeled methoxy groups)	Long	629	818	1.301	4.16
Compound 4^(m) (¹³C-labeled methoxy groups)	Short	482	587	1.218	2.98
Compound 4 (unlabeled)	Long	882	964	1.092	4.91
Compound 4 (unlabeled)	Short	552	560	1.014	2.85

^aDP Degree of polymerization calculated from the Mw and theoretical molecular mass of the lignin model

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