naming The name renin = ren + -in, "kidney" + "compound". The most common pronunciation in English is (long e); (short e) is also common, but using allows one to reserve for rennin. Renin was discovered, characterized, and named in 1898 by Robert Tigerstedt, Professor of Physiology, and his student, Per Bergman, at the Karolinska Institute in Stockholm. See also Angiotensin-converting enzyme Plasma renin activity Renin inhibitor Renin stability regulatory element (REN-SRE) References Further reading External links The MEROPS online database for peptidases and their inhibitors: A01.007 EC 3.4.23 Hormones of the kidneys Peptide hormones Renal physiology Genes mutated in mice