Skip to main content

Table 3 Isotopolog compositions of amino acids from S. frugiperda cells grown in a mixture of [U-13C6]glucose and natural abundance glucose.

From: Studies of the intermediary metabolism in cultured cells of the insect Spodoptera frugiperda using 13C- or 15N-labelled tracers

Compound Position 13 Chemical Shift (δ, ppm) Coupling Constants JCC (Hz) %13Ca 13C13Cb
Alanine (4) 1 175.7 n.d. n.d. n.d.
  2 51.4 59.6 (1), 34.9 (3) 1.8 3.8 (3), 22.2 (1, 3)
  3 18.4 35.1 (2) 1.7 26.5 (2)
Aspartate (5) 1 182.9 n.d. n.d. n.d.
  2 61.3 60.4 (1) 1.8 7.4 (1)
  3 45.9 55.3 (4) 1.9 7.2 (4)
  4 185.1 55.7 (3) 1.8 7.6 (3)
Glutamate (6) 1 176.1   1.3  
  2 56.2   1.0  
  3 27.9   1.1  
  4 32.5 55.1 (5) 1.8 17.1 (5)
  5 179.6 55.1 (4) 1.7 17.2 (4)
  1. aabsolute 13C abundance.
  2. brelative fraction of satellite pairs in the global 13C NMR intensity of the index carbon atom. The coupling partners of the index carbon atom are indicated in parentheses.
  3. n.d., not determined due to poor signal quality.