Meng Q C, King S J, Branham K E, Delucas L J, Lorber B, Oparil S
Department of Cell Biology and Medicine, University of Alabama, Birmingham 35294.
J Chromatogr. 1992 Aug 7;579(1):63-71. doi: 10.1016/0378-4347(92)80363-u.
Angiotensin-converting enzyme from human lung was purified to apparent homogeneity using a five-step purification procedure consisting of ammonium sulfate precipitation, ion-exchange chromatography on DEAE Sephadex A-50, gel permeation on Sephadex G-200, chromatofocusing on a polybuffer exchange (PBE 94) column and high-performance liquid chromatographic gel permeation on a Bio-Sil TSK-250 column. This procedure gave an approximately 700-fold purification with a 20% yield compared to a 550-fold purification and a 1% yield with an affinity chromatography-based procedure. The 20-fold greater yield of the five-step procedure offers a major advantage for preparative use in the structural characterization of angiotensin-converting enzyme.
