Table 1. Intra-species major histocompatibility complex (MHC) variation differs among teleost fishes.

This table shows the lowest percentages of amino acid sequence identities between membrane-distal domains (α1+α2 for MHC I, α1 for MHC IIA, β1 for MHC IIB) of same category MHC molecules found between reported sequences of the same species. In some species no genes for particular categories were found (black boxes), while in other instances only one seemingly intact gene sequence was found (1 sequence) or only pseudogenes were found (pseudogene). A more detailed explanation of this table is provided in Supplementary File 3.

		Species		Neoteleostei
		Zebrafish	Salmon	Medaka	Fugu	Stickleback	Tilapia	Cod
MHC category		(Danio rerio)	(Salmo salar)	(Oryzias latipes)	(Takifugu rubripes)	(Gasterosteus aculeatus)	(Oreochromis niloticus)	(Gadus morhua)
MHC class I	U classical	40%	47%	52%	75%	76%	52%	58%
	U all	27%	38%	32%	29%	62%	27%	58%
	Z	70%	84%	84%	1 sequence	1 sequence	78%	89%
	L	27%	51%				1 sequence
	P		pseudogene		85%			1 sequence
	S		99%
MHC class II	DA IIA	34%	84%	48%	72%	64%	39%
	DA IIB	34%	76%	56%	76%	57%	46%
	DB IIA	23%	20%	20%		1 sequence	21%
	DB IIB	31%	25%	26%		1 sequence	22%
	DE IIA		99%
	DE IIB		99%