Cover: Immunohistochemical localization of p75^NTR in murine lungs. (A) Staining with polyclonal rabbit anti-p75^NTR antibody revealed expression on large bundles of nerve fibers. (B) The isotype control showed no immunoreactivity. Magnification: both ×200. (C) Immunoreactive small nerve fibers adjacent to alveolar tissue stained with a monoclonal rat anti-p75^NTR antibody. (D) Corresponding isotype control. Magnification: both ×200. (E) Immunopositive small subepithelial nerve indicating that the intranasally applicated polyclonal anti-p75^NTR antibody was successful in reaching its target. Magnification: ×600. (F) Large nerve bundle and smaller intramural fibers surrounding the esophagus, stained with the monoclonal anti-p75^NTR antibody. Magnification: ×200. (G) Cells of the inflammatory infiltrate surrounding bronchi immunopositive for p75^NTR. (H) Isotype control. Magnification: both ×600. Brown color indicates positive immunoreactivity in A, E, and G, whereas pink is positive in C and F. For more information see article by Kerzel and coworkers on page 170.