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. Author manuscript; available in PMC: 2017 Jul 21.
Published in final edited form as: Cold Spring Harb Symp Quant Biol. 2017 Feb 16;81:73–78. doi: 10.1101/sqb.2016.81.030981

Figure 4.

Figure 4

Autophagy-supplied substrates prevent energy crisis and fatal nucleotide depletion. Substrates derived from autophagy are required to generate ATP via tricarboxylic acid (TCA) cycle–driven oxidative phosphorylation in starvation. In the absence of autophagy, defective de novo nucleotide synthesis and increased nucleotide degradation cause nucleotide pool depletion and cell death.