Figure 2

Correspondence analysis between the eight loop-types (defined according the length and the flanking regions of the loops) and the structural words in W set _≥30 . αα _s , αβ _s , βα _s , ββ _s correspond to the four different short-loop-types according to the flanking regions, and αα _l , αβ _l , βα _l , ββ _l correspond to the four different long-loop-types according to the flanking regions. αα: loops linking two α-helices, αβ: loops linking an α-helix and a β-strand, βα: loops linking a β-strand and an α-helix, ββ: loops linking two β-strands. The two first axes account for 36% + 26% = 62% of the variance. a) Plot of the eight loop types, b) Plot of W set_≥30 words colored according to their statistical exceptionality: red = OR _w , gray = NS _w , blue = UR _w .