Table 1.

Frequency of cis-regulatory elements in the 3′ region of the genes of clusters 1 and 4

			Frequency (% genes)
Motif	Sequence	Region	Cluster 1	Cluster 4
Poly(A) signal	AAUAAA	-50 to CS	66.5	54
	AUUAAA	-50 to CS	13	15
Poly(A) signal	AAUAAA	CS to +500	43	42
	AUUAAA	CS to +500	38	37
USE	UGUA	-60 to -10	40	34
DSE	UUUGUU	CS to +50	11	10
	UUUUUU	CS to +50	12.5	11

The table shows the percentage of genes in each cluster that contains the motif at least once within the region analyzed.