thresh P-value %words %seq Nwords Nseq total_words total_seq 7.7463 5.0e-05 8.5% 7.0% 24 24 283 341 7.566 0.0001 19.8% 15.2% 56 52 283 341 6.3957 0.0005 70.7% 53.7% 200 183 283 341 5.2721 0.001 97.5% 72.7% 276 248 283 341