a, Confocal images of GFP::LGG-1 puncta in the epidermis of mid L3 stage, control or ogdh-1 knockdown, C. elegans treated with vehicle or α-KG (8 mM). b, Number of GFP::LGG-1 puncta quantitated using ImageJ. Bars indicate the mean. ogdh-1(RNAi) worms have significantly higher autophagy levels, and α-KG does not significantly augment autophagy in ogdh-1(RNAi) worms (t-test, two-tailed, two-sample unequal variance).