Predicted amino acid sequence of SjB6 showing the position of conserved alpha helices and beta strands. Secondary structures were assigned based on the 1HP7 tertiary structure; bold lines are α-helices and broken lines are β-strands. Helices are labelled from “hA” to “hI” and β-strands that constitute β-sheet A-C are labelled as “sA”, “sB” and “sC” respectively. The highly and lowly conserved residues are labelled in black and grey, respectively. Sequences highlighted in red are N-glycosylation sites. Sequences in the box represent the RCL while double bold lines represent the serpin signature.