Immunocytochemistry of NPR-A staining in cultured Rat inner medullary collecting duct (IMCD) cells. The cells were grown on glass slides and fixed in 4% paraformaldehyde. The cells were incubated with AP02128SU for 90 min, followed by an appropriate secondary antibody coupled to Alexa488. Scale bar = 20 µm. Klokkers J et al. (2009)Am. J. Physiol. Renal. Physiol. 297 (3): F693-703.