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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

A new technique for detecting oxytocinase activity in electrophoresis gels.

A sensitive staining method for the detection of oxytocinase (EC activity in electrophoresis gels has been described. The method is based on the enzymatic release of p-nitroaniline (PNA) from two specific synthetic oxytocinase substrates, S-benzyl-L-cysteine-p-nitroanilide (BCN) and L-leucine-p-nitroanilide (LN), respectively. The PNA is then diazotized with sodium nitrite and subsequently coupled to a chromogen, N-(1-naphthyl)-ethylenediamine dihydrochloride (NED) to produce a deep pink/magenta colored azo-dye at the site of oxytocinase activity.[1]


  1. A new technique for detecting oxytocinase activity in electrophoresis gels. Roy, A.C., Saha, N., Tan, S.M., Kamarul, F.Z., Ratnam, S.S. Electrophoresis (1992) [Pubmed]
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