thresh P-value %words %seq Nwords Nseq total_words total_seq 7.2939 0.0001 15.4% 16.3% 714 695 4629 4268 5.982 0.0005 55.6% 61.9% 2575 2643 4629 4268 5.1161 0.001 69.5% 78.1% 3217 3335 4629 4268