thresh P-value %words %seq Nwords Nseq total_words total_seq 6.5006 5.0e-05 11.1% 10.5% 4 4 36 38 6.347 0.0001 13.9% 13.2% 5 5 36 38 5.1464 0.0005 58.3% 57.9% 21 22 36 38 4.4818 0.001 72.2% 71.1% 26 27 36 38