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DDX21 ATPase activity is RNA dependent. a) Spectroscopic ATPase activity of DDX21 in the presence of 5 μM stem IIB RNA measured as a function of ATP concentration. Kcat and Km values noted. b) Increasing concentrations of stem IIB RNA were titrated into DDX21 in the presence of 2.5 mM ATP, with kmaxIIB and KappIIB values noted.
