Table 3.

Comparion of the cellular localization of ABCB1, ABCC1, 5´-nucleotidase (5´-N), adenosine deaminase (ADA) and nucleoside triphosphate diphosphohydrolase-2 (NTPDase2)

Brain structure	ABCB1	ABCC1	5´-N	ADA	NTPDase2 (analysed in detail only in the habenula)
cingulate cortex	few neurons, fibers	fibers	few neurons, fibers	Numerous neurons, fibers
hippocampus	interneurons, neuropil surrounding pyramidal cells of CA3 region	single fibers	neuropil surrounding pyramidal cells	single pyramidal cells, interneurons, fibers
habenula	small-sized neurons, fibers (medial habenula), fibers (lateral habenula)	small-sized neurons, a few fibers (medial habenula)	small-sized neurons, fibers (medial habenula), fibers (lateral habenula)	small-sized neurons, fibers (medial habenula), neurons and fibers (lateral habenula)	immunoreactive (nonstellate; Gampe et al. 2012) astrocyte cell bodies “forming thin cellular sheats that surround neuronal cell bodies”
lateral geniculate	numerous neurons, fibers	single neurons, fibers	fibers	numerous neurons, fibers
hypothalamus	son: single neurons pvn: numerous magnocellular neurons scn: single neurons	son: single neurons pvn: numerous neurons scn: single neurons; numerous astrocytes	son : none pvn : single neurons, fibers scn : fibers	son : none pvn : single neurons, fibers scn : fibers
Substantia nigra	neurons, dense fibers	dense fibers	dense fibers	neurons, dense fibers
ventral tegmental area	dense fibers	dense fibers	dense fibers	dense fibers
periaqueductal gray	dense fibers	fibers	fibers	fibers
Locus coeruleus	single neurons, fibers	some fibers	some fibers	fibers
cerebellum	some Purkinje cells, Golgi 1 and 2 cells, some granule cells, fibers	some granule cells, fibers	fibers	some Purkinje cells granule cells, fibers