Table 1.

Length and range of 3′ UTRs among various gene sets

Species	Length	Length-based categorization (bp)				Random categorization (bp)
		Q1	Q2	Q3	Q4	R1	R2	R3	R4
Human	Mean	220	642	1428	3173	964	1002	986	933
	Min	50	404	974	2058	50	50	50	50
	Max	404	974	2058	24,506	13,669	17,893	13,761	24,506
Mouse	Mean	183	552	1238	2692	860	854	831	850
	Min	50	338	848	1782	50	50	50	50
	Max	338	848	1781	15,948	11,756	15,948	15,587	14,333
Zebrafish	Mean	156	364	650	1256	489	494	492	496
	Min	50	59	493	868	50	52	50	50
	Max	259	493	868	7622	6083	5052	7622	6793
Fruit fly	Mean	87	182	421	1270	284	277	263	259
	Min	50	126	273	679	50	50	50	50
	Max	126	273	679	18,495	11,538	8558	12,542	9011