So this thin filament basically is pulled this way so that these two z lines are basically pulled inward. Now, this process of actually pulling on our thin filament by the movement of our mice and head is known as the power stroke. And the power stroke must take place when our phosphate is basically expelled from that myosin head. So once that power stroke actually takes place, we have to detach that myosin head from our thin filament. And the way that we do that is we basically bind an ATP molecule onto our mic and head. So in the last step, we basically take an ATP molecule and we bind it onto our myosin head and that releases our thin filament from our thick filament.