(A–F) Coronal section of a P7 C57BL/6 brain stained for either GS lectin (green) to mark blood vessels or DOPA decarboxylase (DDC; magenta). Rightmost column shows merged images. Images are from the same brain section and correspond to cortex (A and B), striatum (C and D), and basal forebrain (E and F). DDC immunoreactivity is observed in blood vessels and in axon terminals, and in the latter it appears as distinct puncta in the cortex or more concentrated staining in the striatum. Yellow arrows in (C) indicate a large vein. Str, striatum; Ctx, cortex; AC, anterior commissure; Scale bar: 50 um.