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. 2014 Aug 11;2014:547480. doi: 10.1155/2014/547480

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Copyright © 2014 Joanna Lecka et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Influence of ticlopidine (100 μM or 1 mM) on the ATPase and ADPase activity of apyrase (a) and (100 μM) on human NPP1 and human NPP3 (b). The activity of apyrase without ticlopidine was 159 ± 7 and 87 ± 4 μmoles Pi/min·mg protein for ATP and ADP, respectively. Data are presented as the mean ± SD of 3 experiments carried out in triplicate. The 100% activities without ticlopidine with pNP-TMP as the substrate were 71 ± 3 and 17 ± 1 nmol p-nitrophenol/min·mg protein for NPP1 and NPP3, respectively. *P = 0.0045; **P = 0.0002.