Number of motif and instances from different sources.

(a) Manually curated linear motif classes in the ELM database [3]. (b) Calculated from (f) and (h). (c) This work, Fig 4. (d) This work, Fig 5. (e) Manually curated linear motif instances in the ELM database [3]. (g) Calculated from (a) and (e). (f) Estimated using the ANCHOR algorithm for sequence-insensitive motif detection [9]. (h) Estimated by performing sequence searches using regular expressions and applying empirical filters to the results [21].