thresh P-value %words %seq Nwords Nseq total_words total_seq 7.6788 5.0e-05 21.0% 17.3% 13 13 62 75 6.9683 0.0001 33.9% 28.0% 21 21 62 75 5.7097 0.0005 48.4% 40.0% 30 30 62 75 4.9854 0.001 66.1% 54.7% 41 41 62 75