Unrooted phylogenetic tree containing cell wall-type invertase-like cDNA-derived amino acid sequences. Four groups can be discerned. I, Maize cell wall invertase (CW INV) 1, 2, and 3; and wheat CW INV. II, Broad bean CW INV1; carrot CW INV 1, 2, and 3; potato CW INV1, E, and F; tomato CW INV5; and Arabidopsis CW INV2 and 3. III, Arabidopsis CW INV, CW INV1, and 5; broad bean CW INV2; pea CW INV; and Chenopodium rubrum CWINV 1 and Fragaria × ananassa CW INV; IV, Maize CW INV4; rice CW INV; Arabidopsis fructosidase; and chicory 1-FEH I, IIa, and IIb. pIs, as well as cDNA names or accession numbers, are given between brackets in the figure. The scale bar indicates a distance value of 0.1.