the non-hydrolysable atp analogue , beta , gamma-imido-adenosine-5'-triphosphate ( amppnp , adenylilimidodiphosphate ) does not reduce the stiffness of demembranated sea urchin sperm flagella measured in the rigor state in the absence of mgatp2- and does not cause relaxation of rigor bends .
C0001480
adenosine-5
C0001506
amppnp