thresh P-value %words %seq Nwords Nseq total_words total_seq 8.386 1.0e-05 21.9% 16.7% 7 7 32 42 7.2837 5.0e-05 37.5% 28.6% 12 12 32 42 6.7521 0.0001 43.8% 33.3% 14 14 32 42 5.3559 0.0005 65.6% 50.0% 21 21 32 42 4.6765 0.001 71.9% 54.8% 23 23 32 42