Abstract

The kinetic behavior of human placental alkaline phosphatase, which catalyses the hydrolysis of p-nitrophenyl and of o-carboxyphenyl phosphates, was studied by means of graphical and non-linear regression statistical fitting analysis of data of rate versus substrate concentration. Non linear Lineweaver-Burk and Eadie-Hofstee plots and rational functions of degree 2:2 (F-test assessing the goodness of fit) show non-Michaelian kinetic behavior. In the same way, the behavior of the enzyme was also non-Michaelian in the simultaneous presence of these two substrates.

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