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. Author manuscript; available in PMC: 2015 Feb 23.
Published in final edited form as: Brain Res. 1996 May 13;720(0):191–203. doi: 10.1016/0006-8993(96)00103-5

Fig. 1.

Fig. 1

Brightfield photomicrographs of μ-opioid receptor (MOR1) immunoreactive type 1 astrocytes at 6 days in vitro. MOR1 immunoreactivity was typically punctate with some faint, diffuse immunoreactivity occasionally outlining the plasma membrane and/or adjacent cytoplasm (a,c) Intense immunostaining was often associated with the juxtanuclear cytoplasm (c). The intensity of MOR1 immunoreactivity varied among individual astrocytes; some cells lacked immunoproduct (not clearly shown here). MOR1 immunoreactivity was absent in preabsorbed controls (b). Greater than 95% of the flat, polyhedral cells were glial fibrillary acidic protein-immunoreactive (d). Scale bars: 10 μm (a and b); 25 μm (c), 25 μm (d). Unmodified brightfield optics (a,b,d); differential interference contrast optics (c). Arrows = astrocytes.