thresh P-value %words %seq Nwords Nseq total_words total_seq 8.7139 1.0e-05 18.0% 12.2% 9 9 50 74 7.5705 5.0e-05 22.0% 14.9% 11 11 50 74 7.0221 0.0001 30.0% 20.3% 15 15 50 74 5.5896 0.0005 72.0% 48.6% 36 36 50 74 4.8919 0.001 76.0% 51.4% 38 38 50 74