Highlighting structures with rigidity analysis. (A) Confidence in the embedding of the Duan et al. structure. Segments of the genome are colored according to the interaction frequency cutoff at which the segment becomes floppy. Red regions correspond to the 98.8 cutoff% and blue regions are still rigid at the 99.6% cutoff. (B) The Tanizawa et al. structure colored by rigid component for interaction frequency cutoff 99.0%. Dark gray indicates floppy regions. Rigid components in the subtelomeric regions of chromosome 1 are red (see Discussion).