What is the fate of the radioactive label? C14C14 appears at C‑6 of fructose 6‑phosphate. C14C14 appears in the CO2CO2 evolved by the oxidative phase. C14C14 appears at C‑5 of ribulose 5‑phosphate. C14C14 appears at C‑7 of sedoheptulose 7‑phosphate. C14C14 appears at C‑4 of erythrose 4‑phosphate.