Figure 4

Neuroendocrine and epithelial markers in the SCLC DMS 79 cell line (left panel) and NCI-H526 cell line (right panel). Cells were prepared as cytospins and stained for neuroendocrine markers, chromogranin A (CgA), pro-opiomelanocortin (POMC), neuron-specific enolase (NSE), CD56 (NCAM) neural cell adhesion molecule and epithelial markers cytokeratin (CK) and e-cadherin (E-Cad). Black arrows indicate examples of brown, positive staining and red arrows no staining. All results are representative of three experiments.