Table 1.

Primary antibodies used in this study

Antiserum	Specific immunogen	Host species	Dilution	Supplier	Catalogue	Reference
5-HT	5-HT coupled to bovine serum albumin with paraformaldehyde	Rabbit	1: 2000	ImmunoStar Inc., Hudson WI, USA	20080 Lot 541317	(Chen et al. 2001)
Calretinin	Human recombinant calretinin	Goat	1: 1000	Swant, Bellinzona, Switzerland	CG1 Lot 1§.1	(Sharkey et al. 1998)
NOS	Neuronal NOS	Sheep	1: 1000	Gift of P. Emson, Cambridge, UK	K205	(Williamson et al. 1996)
TH	Native TH from rat phaeochromocytoma	Sheep	1: 160	Chemicon, North Ryde NSW, Australia	AB1542 Lot 25020624	(Haycock & Waymire, 1982)
TH	Synthetic peptides from human and mouse TH	Chicken	1: 100	Chemicon	AB9702 Lot 0605030481