Characterization of diamine oxidase from human seminal plasma
H. G. Schwelberger, J. Feurle, F. Ahrens
Journal of Neural Transmission 120 (2013) 983-986
Diamine oxidase (DAO) was purified to homogeneity from human seminal plasma by consecutive chromatographic fractionation on heparin-sepharose, phenyl-sepharose, CIM-QA, and Superdex 200. Human seminal plasma DAO behaves electrophoretically similar to DAO proteins from other human tissues and has very similar enzymatic properties with histamine and aliphatic diamines being the preferred substrates as well as significant conversion of polyamines. The cellular source and functional importance of DAO in human semen remain to be determined.