Tracing Carbon Atoms
Radioactivity from 1-14C-acetyl-CoA is not
converted to CO2 until the second turn. All of the
radioactivity is lost in the second turn.
(See Figure 20.21a)
Radioactivity from 2-14C-acetyl-CoA is not
converted to CO2 until the third turn. The rest
remains in the cycle intermediates, losing one-half
on each subsequent turn.
(See Figure 20.21b)