Enrichment of 6-mers in the identified reduced peak clusters. U nucleotides were converted to T to comply with the R alignment package. P -values are indicated as not significant (NS), < 0.05 or < 0.01. The green rectangle indicates 6-mers containing the GUGG (GTGG) or GGUG (GGTG) FUS motifs. The blue rectangle indicates 6-mers that are similar to the TDP43 motif (UGUGUG)