Table 3.

Duplication source involving Arabidopsis splicing-related proteins

	Genes	Family*	Single/multiple	Duplication ratio	Duplication events	Chromosomal duplications	Chromosomal duplication ratio
snRNP proteins	91	54	27/27	50.0%	37	7	18.9%
Splicing factors	109	58	33/25	43.1%	51	14	27.5%
Splicing regulator	60	18	4/14	77.8%	42	11	26.2%
Total	260	130	64/66	50.8%	130	32	24.6%

*Family indicates both single copy gene and multiple-copy gene families. The Chromosomal duplication ratio column gives the fraction of all duplication events caused by chromosomal duplications.