Table 2.

Genes of the key participants of the rearrangement machinery in fish.

	Reference	Zebrafish	Stickleback
Rag1	Hansen and Kaattari (1995), Hansen and Kaattari (1996), Greenhalgh and Steiner (1995), Willett et al. (1997)	ENSDARG00000052122	ENSGACG00000011465
Rag2		ENSDAzRG00000052121	ENSGACG00000011461
NHEJ
Ku70	Bladen et al. (2007)	ENSDARG00000090718	ENSGACG00000004868
		ENSDARG00000071551
Ku80		ENSDARG00000068862	ENSGACG00000006130
		ENSDARG00000015599
XRCC4		ENSDARG00000010732	? (But present in a number of other fish)
DNAPK		ENSDARG00000075083	ENSGACG00000001974
Artemis/DCLRE1C		ENSDARG00000045704	ENSGACG00000020073
Ligase IV		ENSDARG00000060620	ENSGACG00000014135
POLYMERASES X
Polymerases λ		ENSDARG00000039613	ENSGACG00000018272
Polymerases μ	Beetz et al. (2007)	ENSDARG00000042507	ENSGACG00000001887
TdT	Hansen (1997), Beetz et al. (2007)	ENSDARG00000038540	ENSGACG00000002880