ab28311 staining Angiotensin Converting Enzyme 1 antibody - Aminoterminal end catalytic domain in human mesenteric artery tissue by Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections).Tissue was fixed in paraformaldehyde and a heat mediated antigen retrieval step was performed using TRIS pH 9.0, 123°C for 1 minute. Samples were then permeabilized using 0.1% Triton, blocked with 3% BSA for 30 minutes at 25°C and then incubated with ab28311 at a 1/500 dilution for 16 hours at 4°C. The secondary used was an undiluted goat anti-rabbit polyclonal-HRP.See Abreview