Table 1. Comparison of housekeeping and non-housekeeping genes between pigs and humans.

Structure	Housekeeping gene			Non-housekeeping gene
	Pigs	Humans	P-valuec	Pigs	Humans	P-value
Total intron lengtha	28,108 ± 173b	21,062 ± 297	1.5e−105	5,9318 ± 523	47,216 ± 487	2.7e−56
5′ UTR length	156 ± 3	125 ± 1.5	3.7e−34	207 ± 4.5	234 ± 4.1	1.6e−29
3′ UTR length	658 ± 13	549 ± 5	1.4e−73	958 ± 7.3	558 ± 4.2	7.3e−65
Average exon length per gene	261 ± 3	227 ± 1	1.8e−6	249 ± 2.7	265 ± 2.9	2.4e−33
CDS length	2,181 ± 10	1,460 ± 5	8.7e−234	3,047 ± 11.4	3,124 ± 10.8	3.1e−17
Transcript length	3,312 ± 13	2,200 ± 5	7.7e−7	4,021 ± 17.1	3,841 ± 14.3	8.6e−94
Number of exons	9.2 ± 0.1	8.8 ± 0.2	1.7e−4	15.2 ± 0.2	13.6 ± 0.1	4.2e−4

Notes.

^aThe length is measured in nucleotides.

^bThe value gives the average and standard error of mean.

^cThe P-value was calculated based on the Mann-Whitney test.

UTR

untranslated region

CDS

coding sequence