Subsequently, the electric fields produced by these environments have been measured using the TITAN code and listed in Table . As can be seen, the fields at the different atomic positions can considerably vary in magnitude and direction within one molecule. Due to the above-described test calculations with homogeneous electric fields, we know that the Chl-c molecules are quite sensitive to fields in the positive y direction. Interestingly, at the position of the NA and ND atoms and also at the position of the magnesium atoms, (strong) field