Jahn-Teller pseudo-effect as a cause of the release of iron from the plane of the haeme group and the trigger mechanism of the conformational changes on oxygenation of haemoglobin

On the basis of the succesive estimation of the vibrone interaction (Jahn-Teller pseudo-effect) the paper presents an explanation of the position of the iron atom outside the plane of haeme in desoxyhaemoglobin and its return to the plane of haeme on oxygenation.