Enzymes that utilize ATP in phosphate transfer require an alkaline erath metal (M) as the cofactor M is

Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor M is

All enzymes that utilize ATP in phosphate transfer require

It is very easy to obtain M^(+) ion from an atom of alkaline earth metals. But M^(+) ions are not formed. Why?

________ metal act as co-factor in phosphate transfer of ATP by enzymes.