thresh P-value %words %seq Nwords Nseq total_words total_seq 8.6888 1.0e-05 30.0% 28.6% 6 6 20 21 7.5453 5.0e-05 50.0% 47.6% 10 10 20 21 7.05 0.0001 60.0% 57.1% 12 12 20 21 5.6017 0.0005 75.0% 71.4% 15 15 20 21 4.9235 0.001 80.0% 76.2% 16 16 20 21