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Origin of carbons

□ Directly from each dietary amino acid

□ From carbons of other amino acids

□ From carbons of sucrose

■ Total amino acids in aphid tissue jl

H 0 cfl cfl

Figure 2.12 Origin of the carbons of each amino acid in the pea aphid, Acyrthosiphon pisum, reared on an artificial diet with balanced amino acid composition as in aphid tissue.

Note: Carbons are derived from amino acids in the food, from other dietary amino acids after conversion, or from dietary sucrose. For each amino acid, the sum of the carbons from different sources is roughly the same as the amount recovered in aphid tissues (black bars).

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