Effects of terbium and pH on structure of anticoagulation factor II from Agkistrodon acutus venom probed by fluorescent spectroscopy and equilibrium dialysis
Abstract:Anticoagulation factor II (ACF II) isolated from the venom of Agkistrodon acutus is an activated coagulation factor X-binding protein with marked anticoagulant activity. Present studies show that the pH has a marked effect on the fluorescence intensity of holo-ACF II; however, no appreciable shift of the emission maximum of holo-ACF II was observed in the pH range of 3-10. It was deduced from a relatively weak fluorescence emission of holo-ACF II at a neutral pH (6-7) that native holo-ACF II assumes a compactl… Show more
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