Table 4.

Top 20 descriptors of 4-mer motifs. Top 20 descriptors of the 4-mer motifs are contained in the reference set of 167 DNASDs. The descriptors of the TATA motif are ranked at the 199th and 98th when applied for the HPL and DPL datasets, respectively.

Rank	HPL dataset			DPL dataset
	4-mer motif	Score	Included (m = 99)	4-mer motif	Score	Included (m = 74)
1	TGAA	1000	+	AAAG	1000	+
2	TGAT	941	+	AAGA	956	+
3	CCGG	878	−	TTCG	948	+
4	TATG	843	+	AGAA	922	−
5	TGGA	817	−	GAAA	866	−
6	GATG	770	+	AAGG	791	+
7	TCAA	739	+	CGCC	787	−
8	TACA	702	+	AGAT	777	−
9	AGGC	697	−	AATA	759	−
10	ATGA	694	+	TCGC	747	−
11	TTGA	672	+	TGAT	744	+
12	CGGC	662	−	TGAA	732	−
13	CAGG	651	−	ATCG	732	+
14	ATGT	634	−	TCGA	724	+
15	AGCG	633	−	CGGT	724	−
16	CGCG	629	−	ATAA	712	+
17	AGCC	618	−	CGAT	710	−
18	TCAT	595	−	CGCG	703	−
19	GAGC	592	+	GAAG	699	+
20	AGGG	582	−	ATAG	697	−
⋮	⋮	⋮	⋮	⋮	⋮	⋮
				25 AAGT	642
⋮	⋮	⋮	⋮	⋮	⋮	⋮
199	TATA	111	−	98 TATA	365	−

+: included in the set of m DNASDs.

−: not included in the set of m DNASDs.