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. Author manuscript; available in PMC: 2015 Jan 26.
Published in final edited form as: Eur J Neurosci. 2000 Apr;12(4):1281–1293. doi: 10.1046/j.1460-9568.2000.01015.x

Fig. 1.

Fig. 1

Opioid receptor immunoreactivity in neuronal precursors. (A–E) Cerebellar external granule layer (EGL) neuronal precursors expressed μ (A) and δ (C) opioid receptor immunoreactivity in brightfield photomicrographs; however, few, if any, cells were κ immunoreactive (E) at 48 h in vitro. Specific immunoreactivity was not present in μ (B) or δ (E) preabsorbed controls. Scale bar = 15 μm. (F) The proportion of EGL cells expressing μ and δ opioid receptor immunoreactivity was similar at 48 h and 7 days in vitro.