Immunofluorescence staining of NPR-Bi in Cryosection of Human Kidney. The Section was incubated with NPR-Bi antibody Cat.-No AP02130SU overnight and detected using Biotinylated secondary antibody and Alexa Fluor 594-streptavidin conjugate. The nuclei were visualized with DAPI. AP02130SU stains the luminal membrane of cortical collecting ducts. Hirsch J R et al. (2003) AM J Physiol Renal Physiol 285:F370-F374.