Table 2 Major signal assignments in solid-state ¹³C MAS NMR spectra of rice cell walls.

I′₉ (aldehyde lignin C9)

190

C₁ (cellulose C1)

105

X_1a (rigid/twofold xylan C1)

105^a

X_1b (mobile/threefold xylan C1)

103^a

C_4a (crystalline/internal cellulose C4)

89

C_4b (amorphous/surface cellulose C4)

84

X_4a (rigid/twofold xylan C4)

82^a

X_4b (threefold/mobile xylan C4)

77^a

X_2,3 (xylan C2 and C3)

75-72^a

C_2,3,5 (cellulose C2, C3 and C5)

75-72

C_6a (crystalline/internal cellulose C6)

65

X₅ (xylan C5)

64^a

C_6b (amorphous/surface cellulose C6)

63

OMe (lignin methoxyl CH₃)

57