Cleavage of Na,K-ATPase in conditions permitting phosphorylation.
The enzyme was suspended in the medium containing 130 mM NaCl or other
salts, and incubated with 5 mM
ascorbate/H2O2, 5 μM FeSO4
as follows: (A) 166 μM ATP and indicated times;
(B) 40 μM AMP-PNP and indicated times;
(C) 500 μM ATP, 10 min incubation; (D)
500 μM ATP, oligomycin, 200 μg/ml, 5 min incubation;
(E) 20 μM AMP-PNP, 300 mM choline chloride or 300 mM
NaCl, 5 min incubation.