eATP, eADP, eAMP and eADO in enzyme reaction solutions of nondistended and distended preparations were measured using a reverse-phased gradient Agilent Technologies 1200 liquid chromatography system equipped with a fluorescence detector (Agilent Technologies, Wilmington, DE, USA) as described previously [9 (link),34 (link),82 (link)]. Areas of HPLC peaks were calculated and calibrated to individual etheno-derivatized purine standards of eATP, eADP, eAMP and eADO.
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