Fig. 4. XEG digestion products of charophyte AIR. A, Products from Chara polysaccharide extracts prepared by the method of Morrison et al. (1993). B, Products from Klebsormidium flaccidium AIR. Products were developed on silica gel TLC in either butanol : acetic acid : water 3 : 1 : 1 (A) or butanol : acetic acid : water 2 : 1 : 1 (B) and stained with thymol–H₂SO₄. The streaking seen in the CDTA extract is due to the presence of CDTA still remaining in the preparation after dialysis for 72 h. DP 7, 8 and 9 indicate the xyloglucan‐derived oligosaccharides XXXG, XXLG and XLLG (XLLG and XXFG are not separated by these methods).