Comparative analysis of the Mercenaria mercenaria genome provides insights into the diversity of transposable elements and immune molecules in bivalve mollusks

Table 2 Steamer elements subfamilies found across Bivalvia

Host species	Family	Number of copies				Genomic proportion (%)	Base pair masked in genome	Average length
	Family	LTRH	RM > 4 kb	RM > 2 kb *	RM	Genomic proportion (%)	Base pair masked in genome	Average length
Mercenaria mercenaria	SteMemer	7	7	8	156	0.01	148,438	951
1858 Mb
Mercenaria mercenaria YKG	SteMemer	5	6	7	166	0.01	148,344	894
1788 Mb
Ruditapes philippinarum	SteRuphi	0	0	3	22	0.00	21,751	989
1123 Mb
Cyclina sinensis	SteCysin	2	2	1	64	0.01	54,243	848
903 Mb
Dreissena rostriformis	SteDrros	5	5	5	65	0.01	78,925	1214
1242 Mb
Anadara broughtonii	SteAnbro1	5	5	0	176	0.01	104,324	593
885 Mb	SteAnbro2	5	5	5	153	0.01	114,234	747
	SteAnbro3	5	7	15	216	0.02	177,833	823
Crassostrea gigas	SteCragi	1	1	10	99	0.01	96,188	971
648 Mb
Crassostrea virginica	SteCavi	0	0	1	70	0.01	42,104	601
685 Mb
Saccostrea glomerata	SteSaglo	4	5	9	284	0.03	203,715	717
788 Mb
Bathymodiolus platifrons	SteBapla	3	3	8	216	0.01	168,122	778
1658 Mb
Modiolus philippinarum	SteMophi	2	2	13	244	0.01	195,023	799
2630 Mb
Limnoperna fortunei	SteLifor	1	5	19	142	0.01	161,653	1138
1673 Mb
Mytilus coruscus	SteMycor1	2	4	3	96	0.00	93,720	830
1904 Mb	SteMycor2	9	11	6	265	0.01	256,509	968
Mytilus galloprovincialis	SteMygal1	1	1	10	81	0.01	92,780	1145
1282 Mb

Number of copies and genomic proportions of Steamer elements subfamilies were estimated in bivalve genomes using LTRHarvest (LTRH) or RepeatMasker (RM). Copy numbers are given according to the estimation procedure. The star indicates between 2 and 4 kb

ISSN: 1471-2164