Table 7.

Comparison of protein coding potential for Alu-derived exons versus other TE-derived exons. Average protein coding potentials are compared between the specific pairs of groups indicated using the Student's t-test. Comparisons were done using two GeneMark models: pre-trained and custom-trained (see Methods).

GeneMark model	Comparison groups	mean	df	t	P
Pre-trained	Alu-exons vs other TE-exons	0.0069 vs 0.3229	158	9.8	5.2e-18
	Alu-containing composite TE-exons vs other TE-exons	0.0135 vs 0.3417	158	9.6	1.3e-17
Custom-trained	Alu-exons vs other TE-exons	0.2034 vs 0.3802	158	2.9	4.3e-3
	Alu-containing composite TE-exons vs other TE-exons	0.2033 vs 0.3920	158	3.4	7.4e-4