Co-expression of FA1/dlk1 with calbindin but not parvalbumin in the SN.

Digitalized photomicrographs of FA1/dlk1-ir cells in the ventral mesencephalon of adult rats. Some calbindin (CB)-ir cells (arrowheads) showed co-localization with FA1/dlk1 (open arrowhead, upper row) in the substantia nigra pars compacta, whereas several CB-ir neurons (arrowheads, upper row) and FA1/dlk1-ir cells (arrows, upper row) did not co-localize. As expected from the distribution pattern depicted in Fig. 1 no co-localization was detected for FA1/dlk1 with parvalbumin (PV) in the substantia nigra pars reticulata (lower row). Scale bar: 50μm.