Figure 1
The presence and distribution of OGF and OGFr in human anaplastic thyroid cancer cells. Photomicrographs of log-phase KAT-18 cells visualized with differential interference or stained with antibodies to [Met5]-enkephalin (OGF) or OGFr. Immunoreactivity was associated with the cytoplasm and a speckling of stain was noted in cell nuclei; no staining was observed with secondary antibodies only (inset). Scale bar = 10 μm.