Table 1.

E-box matches for all promoters

Superfamily	Family	Promoters	E-box Matches	Percent with E-box	P-value
Sra	sra	39	0	(0)	NS
Sra	srab	27	1	(3.7)	NS
Sra	srb	19	0	(0)	NS
solo	srbc	64	0	(0)	NS
Str	srd	71	0	(0)	NS
Sra	sre	55	14	25.5	<0.0001
Srg	srg	69	4	5.8	NS
Str	srh	304	104	34.2	<0.0001
Str	sri	78	39	50.0	<0.0001
solo	srsx	35	1	(2.9)	NS
Srg	srt	73	1	(1.4)	NS
Srg	sru	45	4	8.9	0.02
Srg	srv	36	2	5.6	NS
solo	srw	148	8	5.4	0.04
Srg	srx	137	3	2.2	NS
Srg	srxa	16	2	12.5	NS
solo	srz	104	51	49.0	<0.0001
Str	str/srj	323	9	2.8	NS
	All SR	1675	246	14.7
	All genes	20569	500	2.4	NA

E-box hits are the 500 highest scoring motif matches in promoters from -200 to -20 from the translation start codon. Percent values based on zero or one hit are in parentheses to indicate high uncertainty. The uncorrected P-value shown was determined by comparison with the number of hits in all promoters (Fisher's exact test for small families and the χ-square approximation for large families). After Bonferoni correction for multiple testing the sru and srw P-values are not significant. The str and srj families are closely related and were analyzed together. A few small chemoreceptor families are not shown individually, so numbers shown do not add up to the SR total. SR, all members of putative chemoreceptor families; NA, not applicable; NS, not significant.