Figure 3

NMR structure of Helicoverpa armigera SCP-2.
(A) The stereo ribbon representations of Helicoverpa armigera SCP-2 three-dimension structure. The α-helices are labeled with number “1–5” and stranded β-sheets are labeled with number “I–IV”. N- and C-termini are labeled as “N” and “C” , respectively. (B) Superposition of the 20 conformers with the lowest energy in NMR spectometry. (C) Tertiary structures of sterol carrier protein from human, rabbit and mosquito.