Antibody:	anti-p20/17
Detection system:	Biotinylated secondary antibody/[Strept]avidin coupled to horseradish peroxidase
Assay notes:	The antibody recognizes the cleavage site only after it was cleaved.

Structure	Level	Pattern	Image	Note
TS19: dorsal root ganglion	Present		2F

Structure	Level	Pattern	Image	Note
TS19: dorsal root ganglion	Present	Non-Uniform	2I	The number of positive cells was not equal at different position along the anteroposterial axis.

Structure	Level	Pattern	Image	Note
TS19: trigeminal ganglion	Present		3B

Structure	Level	Pattern	Image	Note
TS22: trigeminal ganglion	Present		3E	The number of Positive cells increased and peaked at E14.5.

Structure	Level	Pattern	Image	Note
TS24: trigeminal ganglion	Present	Single cells	3H	The number of expressing cells decreased. Only a few positive cells were detected.

Structure	Level	Pattern	Image	Note
TS19: forebrain	Present		4B	Many positive cells were detected.

Structure	Level	Pattern	Image	Note
TS17: forebrain	Present		4D	Many positive cells were detected.

Structure	Level	Pattern	Image	Note
TS17: forebrain	Present		4E	Many positive cells were detected.

Structure	Level	Pattern	Image	Note
TS17: forebrain	Present		4F	Many positive cells were detected.

Structure	Level	Pattern	Image	Note
TS26: cerebral cortex ventricular zone	Present		4I

Structure	Level	Pattern	Image	Note
TS27: cortical plate	Weak	Single cells	4L	Very few positive cells were detected.

Structure	Level	Pattern	Image	Note
TS28: cerebral cortex	Absent		4O