Fig. 6: Hierarchical structure of Loxosceles silk.
From: Protein secondary structure in spider silk nanofibrils
a The recluse spider’s cob-web. b Looped metastructure made of Loxosceles silk ribbons. c Single ribbon (false-colored SEM, n = 5 independent SEM experiments). d Schematic of ribbon entirely composed of 20 nm thin nanofibrils. e β-sheets (blue), α- (pink) and 31-helices (orange) within a single nanofibril (schematic). f Ala-β-sheet, Gly-31-helix, and α-helix segment in protein 2N3E83. Yellow cubes: functional groups on the Cα atoms; transparent spirals: approximate helix structure. The color scheme used for different atoms are the same as Fig. 3. g Silk protein primary structure.
