Table 2

ESTIMA:Songbird Build 2, presence ("yes") or absence ("no") of specific sequences of interest assessed by direct BLAST with available avian or mammalian sequences against 58,211 sequences in the ESTIMA database as of June 2005.
	Yes	No		Yes	No		Yes	No

Steroid Receptors			Extracellular Signaling			GABA transmission

Androgen Receptor		•	BDNF	√		GABA-A alpha 1	√
estrogen receptor alpha		•	cannabinoid receptor		•	GABA-A alpha 2	√
estrogen receptor beta		•	IGF-2	√		GABA-A alpha 4		•
estrogen receptor gamma	√		N-CAM	√		GABA-A alpha 5	√
RARalpha	√					GABA-A beta 3	√
RARbeta	√		Intracellular signaling			GABA-A delta	√
RARgamma		•	Calbindin	√		GABA-A gamma 2	√
RXRalpha	√		CAMKII	√		GABA-A gamma 3/4	√
RXRbeta		•	Canarygranin	√		GABA-B	√
RXRgamma		•	CRABPI	√		GABA-C rho-2B		•
Steroid Metabolism			CRABPII	√		GAD-65	√
Aromatase	√		CRBPI		•	GAD67	√
P450-CYP26		•	CRBPII		•	Potassium channels
zRalDH	√		GAP-43	√		Kcnma1		•
Immediate Early Genes			MAPKK	√		Kcnmb1		•
ARC	√		Narp	√		Kcnmb2		•
c-fos	√		parvalbumin	√		Kcnmb3		•
c-jun	√		PAX-6	√		Kcnmb4		•
zenk	√		SNAP-25	√		Kv3.1	√
Cytoskeleton			Synapsin I		•	Transporters
Beta Tubulin	√		synapsin IIb	√		VGAT		•
GFAP	√					VGLUT		•
NFM	√					VIAAT	√
vimentin	√

Replogle et al. BMC Genomics 2008 9:131 doi:10.1186/1471-2164-9-131