Figure 1: Diversity of secondary structures on the convex sides of LRRs in representatives of the eight classes-pig RI, Skp2, InlA, InlJ, YopM, FLS2, LINGO-1, and BACCAC_03700-for classes “RI-like”, “Cysteine-containing”, “SDS22-like”, “IRREKO”, “Bacterial”, “Plant-specific”, “Typical”, and “TpLRR” respectively. In all figures, the β-strands from two consecutive LRRs are shown. Green arrows represent β-strands, red ribbons α-helices, yellow ribbon 310-helix, pink ribbon polyproline II helix, orange tube an extended conformation, and blue tubes β-turns. Throughout the text, loops connecting the concave side to the convex side are referred to as “ascending”, and the ones connecting the convex side to the concave side are referred to as “descending”.