Structural characterization of Spinacia oleracea trypsin inhibitor III (SOTI-III)

Glotzbach, B.; Schmelz, S.; Reinwarth, M.; Christmann, A.; Heinz, D.W.; Kolmar, H.

doi:10.1107/S0907444912043880

Figure 4
Secondary structure and topology of SOTI-III. (a) Secondary-structure elements of SOTI-III. The four loops (mainly [beta]

-turns) are labelled L1-L4. Green arrows indicate the three [beta]

-strands. The short helix [alpha]

1 is colored purple. Disulfide bonds are drawn as black lines. The cysteine residues involved are labelled I-VI. The red U-shaped line symbolizes the [beta]

-hairpin with a [gamma]

-turn of the inhibitor loop L4. (b) Topology of SOTI-III. Residue numbers for boundaries of secondary-structure elements are shown. The coloring of secondary-structure elements is the same as in (a).