Decryption of the survival “black box”: gene family expansion promotes the encystment in ciliated protists

BMC Genomics

Table 1 The ratio of multi-exon genes in nine species among three class

Class	Species	The number of multi-exon genes	The number of all genes	The ratio of multi-exon genes
Heterotrichea	Stentor coeruleus	6218	30,478	0.20
Heterotrichea	Blepharisma stoltei	4670	25,785	0.18
Oligohymenophorea	Tetrahymena thermophila	18,732	26,742	0.70
	Pseudocohnilembus persalinus	12,034	13,179	0.91
	Paramecium tetraurelia	31,615	39,580	0.80
Spirotrichea	Euplotes vannus	21,713	32,779	0.66
	Oxytricha trifallax	15,822	24,885	0.64
	Stylonychia lemnae	9980	15,228	0.66
	Pseudourostyla cristata	19,567	40,592	0.48

ISSN: 1471-2164