Fig. 3

A simplified version of the multiple alignment of deduced amino acid sequences of FvXTHs belonging to group I/II (a), and groups IIIA and IIIB (b). The catalytic conserved domain (DEIDFEFLG), the secondary structures of β sheets (arrows) and α-helices (spiral), and loops 1, 2 and 3 (lines) are indicated. The conserved residues are shown in red letters; N-glycosylation residues are indicated as *. (The entire alignment is presented in Additional files 3 and 4: Figs. S1 and S2)