TABLE 5.

Effects of some compounds on the PP_i inhibition on Thermotoga ATP-PFK^a

Effector	% Activity
None	100
0.1 mM PPi	20
0.1 mM PPi and 0.1 mM ADP	57
0.1 mM PPi and 0.1 mM AMP	22
0.1 mM PPi, 0.1 mM ADP, and 0.1 mM AMP	57
0.1 mM PPi and 0.1 mM TDP	69
0.1 mM PPi and 0.1 mM GDP	68
0.1 mM PPi and 0.1 mM CDP	27
0.1 mM PPi and 0.1 mM UDP	47

^aExperimental conditions were 0.5 mM F-6-P, 0.25 mM ATP, 5 mM MgCl₂, 0.2 mM NADH, 175 mM KCl, and 30 mM Tris (pH 7.8) at 50°C.