A new technique for detecting oxytocinase activity in electrophoresis gels.

Autor: Roy AC; Department of Obstetrics and Gynaecology, National University of Singapore., Saha N, Tan SM, Kamarul FZ, Ratnam SS
Jazyk: angličtina
Zdroj: Electrophoresis [Electrophoresis] 1992 Jun; Vol. 13 (6), pp. 396-7.
DOI: 10.1002/elps.1150130181
Abstrakt: A sensitive staining method for the detection of oxytocinase (EC 3.4.11.3) 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.
Databáze: MEDLINE