Fig. 2. Immunohistochemical staining of calcitonin gene–related peptide (CGRP) in the kidneys of rats subjected to ischemia/reperfusion (I/R). Immunohistochemical staining for CGRP in frozen sections of the kidney using a rat anti-CGRP antibody in sham-operated rats ( A ), or rats 1 h after I/R ( B ). Original magnification ×400.