Complex sentence: The third mechanistic model proposed involves the formate oxidation occurring via the initial hydride transfer from formate to the Mo atom, resulting in the formation of an Mo-H intermediate followed by a proton transfer from Mo to the selenocysteine.
Split into simpler sentences: The third mechanistic model proposed involves the formate oxidation occurring via the initial hydride transfer from formate to the Mo atom. What follows is the the formation of an Mo-H intermediate followed by a proton transfer from Mo to the selenocysteine.