However, somewhat small spin populations are calculated for carbons C-3, C-7, and C-13, while only negligible contributions are obtained at C-10 and C-15. This does not directly contradict the photo-CIDNP MAS NMR results depicted in Fig. ) as relative spin populations were not provided in this experimental work . However, it does not support the conslusions drawn by the authors of Ref. . Based on the measured signals, it was proposed in that reference that most of spin density is shifted towards ring C of Chl a and the spin distribution, thereby, appears to be strongly asymmetric.