EPR is a powerful tool to study paramagnetic centers. So, it is widely used in inorganic and bioinorganic chemistry. In fact, I am not even sure if I should call bioinorganic chemistry as biochemistry. Sometimes I read papers and I can't tell if it is a bioinorganic or biochemistry study. Anyway, the short paper I read today was about Helmut Beinert and how he introduced EPR to biochemistry. Obviously, this led to great discoveries.
It is free to read here: