Antibody:	NOS-II antibody
Detection system:	Secondary antibody coupled to horseradish peroxidase
Assay notes:	Fixative was either Bouin's fixative or 4% paraformaldehyde and specimens were either embedded in paraffin or cryosectioned.

Structure	Level	Pattern	Image	Note
TS18: olfactory epithelium	Present	Regionally restricted	1B , 1A	Expression is in differentiating olfactory receptor neurons at the top of the nasal pit and their axons projecting into the olfactory bulb.

Structure	Level	Pattern	Image	Note
TS22: olfactory epithelium	Present	Regionally restricted	2B , 2A	Expression is in olfactory receptor neurons at the roof of the nasal cavity and their axons projecting into the olfactory bulb.

Structure	Level	Pattern	Image	Note
TS26: olfactory epithelium	Trace	Single cells	2C	Expression is in neurons.
TS26: main olfactory bulb glomerular layer	Present	Regionally restricted	2C	Expression is in axons projecting into the olfactory bulb.
TS26: nerve	Present	Regionally restricted	2C	Expression is in nerve fibers running from the olfactory epithelium to the olfactory bulb.

Structure	Level	Pattern	Image	Note
TS14: olfactory placode	Absent

Structure	Level	Pattern	Image	Note
TS24: olfactory epithelium	Present	Regionally restricted		Expression is in olfactory receptor neurons at the roof of the nasal cavity and their axons projecting into the olfactory bulb.