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. 2006 Oct 26;34(20):5966–5973. doi: 10.1093/nar/gkl731

Figure 1.

Figure 1

The accuracy of BLAST statistics. 10 000 shuffled mouse sequences were compared to shuffled human RefSeq (20) sequences from Build 35 of the human genome. The number of queries whose best match had a reported P-value ≤ x is plotted against x, using a log–log scale. Curves are shown for B-BLAST, S-BLAST, SU-BLAST, C-BLAST and CU-BLAST. The diagonal line indicates the theoretical prediction for all curves. The vertical line at x = 10−4 indicates the point at which a single query with equal or better P-value is expected.