Figure 1 .

Wall components and cross-links between them. (A) Reducing end of chitin linked to a side-branching β1,3-Glc on β1,6-glucan. (B) Reducing end of chitin linked to a nonreducing end of β1,3-glucan. (C) Reducing end of β1,3-glucan chain linked to a side-branching β1,6-Glc on β1,3-glucan. (D) Reducing end of GPI glycan (possibly the α1,4-Man) to internal Glc in β1,6-glucan (linkage to nonreducing end of β1,6-glucan is also possible). (E) Ester linkages between β1,3-Glc and γ-carboxyl groups of glutamates in PIR protein internal repeats. (F) Disulfide link between CWP. Chemical treatments used to release CWP are indicated.