a close relationship was observed between the cofactor activity of monovalent cations and their effectiveness in the protection by pyridoxal-p : in the presence of active monovalent cations ( k+ , nh+4 and rb+ ) pyridoxal-p could provide the protection but not in the presence of inactive cations ( li+ , na+ and cs+ ) as well as in the absence of inorganic monovalent cations .
C0007447
cations
C0007449
monovalent cations