Ca2+ release from platelet intracellular stores by thapsigargin and 2,5-di-(t-butyl)-1,4-benzohydroquinone : relationship to Ca2+ pools and relevance in platelet activation

The effects of the Ca(2+)-ATPase inhibitors thapsigargin (Tg) and 2,5-di-(t-butyl)-1,4-benzohydroquinone (tBuBHQ) were examined by using Ca(2+)-regulatory systems of platelet mixed membranes, saponin-permeabilized and intact platelets. Both agents inhibit Ca(2+)-ATPase activities of platelet mixed m...

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