thresh P-value %words %seq Nwords Nseq total_words total_seq 9.7515 1.0e-05 21.1% 20.5% 8 8 38 39 8.7082 5.0e-05 39.5% 38.5% 15 15 38 39 8.1903 0.0001 44.7% 43.6% 17 17 38 39 6.7933 0.0005 55.3% 53.8% 21 21 38 39 6.094 0.001 60.5% 59.0% 23 23 38 39