Fig. 1.

Sequence alignment of AINV genes from A. thaliana and D. officinale. Dark blue, pink, and light blue shading denote 100%, 75%, and 50% conservation of amino acid residue, respectively. Yellow lines indicate the predicted transmembrane domains. Green lines highlight the predicted signal peptides. Orange dots represent conserved motifs of NDPNG (β-fructosidase), FRDP, and WECXDF. The solid black line indicates the glycosyl hydrolases family GH32 N-terminal domain, and the black dashed line represents glycosyl hydrolases family GH32 C-terminal domain