In case of the hinge-type model from PSI, deprotonation of His at the π-N possition did not lead to a considerable change in the spin density. This was rather surprising taking into account an acute angle between His and P A in the original crystal structure. It can be explained by a large distance and weak interactions between these molecules. To the best of our knowledge, there is no experimental evidence available about spin density being present at the axial His molecules in PSI. Therefore, our results do not contradict any experimetal measurements. However, they also do not provide us with any hints on the true protonation state of the axial His molecule in PSI.