From: Studies of the intermediary metabolism in cultured cells of the insect Spodoptera frugiperda using 13C- or 15N-labelled tracers
Compound
Specific incorporation in%
Nucleosides
Ribose moiety
40–45
Pyrimidine base
10–15
Purine base
< 5
Amino acids
Alanine
45–50
Glutamate/Glutamine (C-4/C-5)
30
Aspartate/Asparagine
Others