Portelli C
Physiologie. 1976 Oct-Dec;13(4):315-9.
According to our model, in the stage which precedes the delivery of energy from the high-energy bond, one calcium ion and two sodium ions are fixed by the phosphates of the ATP molecule. In this way, a triangle of ions with the peak situated near the high-energy bond is formed. This triangle is an electric polarizing system, which directs the electronic orbitals of the phosphates in two diverging directions, starting from the calcium ion and going to the two sodium ions. The above-mentioned polarization helps, at the opportune moment, the breaking of the high-energy bond and the delivery of two waves of electronic excitation. In the stage which precedes the recovery of the high-energy bond, one magnesium ion takes the position of the calcium ion, and two potassium ions replace the two sodium ions. These ions form a polarizing system, which directs the electronic orbitals of the ADP and phosphoric acid molecule in two converging directions, starting from the two potassium ions and arriving at the magnesium ion. This polarization favours the building of the high-energy bond, when two waves of electronic excitation arising from a donor molecule arrive at the level of the two phosphates which must be united.
根据我们的模型，在高能键释放能量之前的阶段，一个钙离子和两个钠离子被ATP分子的磷酸基团固定。这样，就形成了一个离子三角形，其顶点位于高能键附近。这个三角形是一个电极化系统，它将磷酸基团的电子轨道从钙离子开始，朝着两个钠离子的方向引导到两个发散方向。上述极化在适当的时候有助于高能键的断裂和两波电子激发的释放。在高能键恢复之前的阶段，一个镁离子取代钙离子的位置，两个钾离子取代两个钠离子。这些离子形成一个极化系统，它将ADP和磷酸分子的电子轨道从两个钾离子开始，朝着镁离子的方向引导到两个收敛方向。当来自供体分子的两波电子激发到达必须结合的两个磷酸基团的水平时，这种极化有利于高能键的形成。
