Immunolocalization of CRAC in guinea pig aortas. Transverse cut of guinea pig aortas, showing intense and diffuse immunostaining in all layers of the vessel wall in three different animals. The antibody labeling was detected by Fast Rd chromogenic substrate and tissue counterstained with hematoxylin. A. Group 3 mg/kg, anti-CRAC, magnification 200X. B. Group 30 mg/kg, anti-CRAC, magnification 200X. C: Group 30 mg/kg, anti-CRAC, magnification 400X. D. CRAC peptide pre-adsorbed antiserum, magnification X200. E. Standard diet group aorta immunostained with anti-CRAC antiserum, magnification 200X.