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17 mM. Site-directed mutagenesis study showed that E54 and D227 constitute the binding site of Ca2+. ATR-FTIR spectroscopy revealed secondary structural changes upon Ca2+ binding to E54 and D227, while they are negatively charged with or without Ca2+ binding.Despite the rapid progress in C-C bond-forming reactions using Katritzky salts, their deaminative allylation remains a challenge. Inspired by the metallaphotoredox-catalyzed allylic substitution regime, here, we report the deaminative allylation of Katritzky salts via cobalt/organophotoredox dual cataly