Table 1.

List of primary antibodies used in this study.

Antibody	Antigen	Host, type	Dilution	Source (Cat. No.)
Calbindin D-28K	Recombinant rat calbindin D-28K	Rabbit, polyclonal	1:500	Swant, Marly, Switzerland (CB-38)
Calretinin	Guinea pig calretinin, full length amino acid sequence	Goat, polyclonal	1:500	Merck-Millipore, Darmstadt, Germany (AB 1550)
ChAT	Human placental choline acetyltransferase	Goat, polyclonal	1:250	Merck-Millipore (AB 144P)
Cx30.2	Peptide derived from amino acids 92–109 of mouse Cx30.2	Guinea pig, polyclonal	1:500	Pineda Antibody Service, Berlin, Germany
Cx30.2	Peptide derived from the last 20 amino acids of the C-terminal end of mouse Cx30.2	Rabbit, polyclonal	1:5000 (wb) 1:500 (He)	Pineda Antibody Service
Cx36	C-terminal region of rat and mouse Cx36, derived from amino acids 286–303	Mouse, monoclonal	1:500	Invitrogen (37-4600)
Disabled-1	GST-mDisabled-1 fusion protein, corresponding to amino acids 107–243	Rabbit, polyclonal	1:500	Gift from Dr B. Howell, NIH
β-Galactosidase	Full length purified β-gal from Escherichia coli	Chicken, polyclonal	1:500	Abcam, Cambridge, MA, USA (ab9361)
GFP	Full-length Aequorea victoria GFP	Mouse, monoclonal	1:5000	Clontech, Mountain View, CA, USA (632380)
Melanopsin	15 most N-terminal amino acids of the mouse melanopsin extracellular domain	Rabbit, polyclonal	1:5000	Advanced Targeting Systems, San Diego, CA, USA (AB-N38, UF006)
Parvalbumin	Rat muscle parvalbumin	Rabbit, polyclonal	1:5000	Swant (PV28)

Dilutions were identical for labeling of cryosections, retinal whole-mounts, Western blot (wb) and HeLa cell experiments (He) if not stated otherwise.