Table 2.

Domain organization of LTR families.

Superfamily	patterna	Number of families
Copia	GAG-IN-RT	35
	IN-RT	19
	RTb	2
Gypsy	GAG-RT-IN	14
	RT-IN	3
	RTb	1
Other	GAGc	3
	RTd	1
	Other	7

^a This table only shows the organization of GAG, IN and RT. See S3.1 for more information.

^b These elements are classified by RT similarity.

^c ORFs inside the three families share week similarity with some putative GAG proteins in UniProt.

^d This RT is from Mtr81 but can not be assigned to either superfamily.