Figure 6.

The deduced glycosyl sequences of side chain B of the RG-IIs isolated from the primary walls of lycophytes, pteridophytes, and angisoperms. A, The deduced glycosyl sequences of the largest side chain B oligosaccharide present on each of the RG-IIs. R₁ and R₂ show the locations of the different glycosyl residues in each side chain B. Some smaller fragments were detected by ESI-MS (see 2a-c, 3a, 3b, 4a-c in Table V), but they are most likely generated from the side chain B oligosaccharides when the RG-IIs are treated with warm 0.1 m TFA. B, The glycosyl residues that correspond to R₁ and R₂ in side chain B from RG-II synthesized by lycophytes, pteridophytes, and angiosperms. The number of O-acetyl (O-Ac) groups is also shown. The numbers used to designate each oligosaccharide fragment (1, 5, 6, and 7) correspond to those shown in Table V.