Table 1.

Assignments of the characteristic mid-IR bands in the mid-IR spectrum of G. lingzhi mycelium.

Wavenumber(cm−1)	Functional Group Assignments
3400	-OH stretching55
2926	CH2 asymmetric stretching56
1640	Amide I56
1457	CH2 in polysaccharides57
1425	C-H deformation in lignin and carbohydrates15
1372	C-H in-plane bending vibration58,59
1314–1316	symmetric CH2 bending of cellulose43
1243	COH in-plane bending/CH in-plane bending58
1152–1156	C-O-C asymmetric stretching of glycosidic linkage44
1078	C-O stretching of β-glucans45,46,51
1044	stretching vibration of C-O-C group60
1025	stretching vibration of C-O α-glycosidic bond47
951	β-glycosidic bond47; C-O and C-C stretching48
867	γ (C-H)61; furanose ring62
778	COO− deformation63
709	CH out-of plane bending64
573	bending vibration of a polysaccharide ring39
523	pyranose ring62; C=O asymmetric deformation65