Figure 4

Alignment of amino acid sequences of the putative precursors of 3FTxs. Cys residues which are shaded in grey are commonly present in short chain 3FTx and form 4 disulfide bridges (solid black lines). Cys residues shaded in black possibly form the additional disulfide bridge (dotted black line) present in the non-conventional 3FTx family. Potential N-glycosylation sites are underlined.