Figure 7A Schematic of mitochondrial energetic profiling with a Seahorse efflux assay. B The Oxygen Consumption Rate (OCR, pmols O2/min) assessed as a representative parameter of OxPhos in control and pths-KD S2R+ cells by a Seahorse efflux assay. n≥3 independent biological experiments each with n>6 technical replicate. Data information: Mean±SEM, **p<0.01, ***p<0.001, ****p<0.0001. Unpaired t-tests C Distinct respiration parameters calculated from relative OCR values obtained in experiments shown in B. p<0.0001 for all comparisons. Data information: Mean±SEM, **p<0.01, ***p<0.001, ****p<0.0001. two-way ANOVA with Sidak's test Confocal images of macrophages from control embryos and those expressing a dominant negative c-ring of ATP synthase (CV-DN) in macrophages. from Stage 12 embryos and germband edge shown with dotted white line. Data information: show Stage 12 embryos. Scale bars: 50µm quantification of macrophages (E) in the germband or (F) on the yolk next to the germband from control embryos and those expressing a dominant negative c-ring of ATP synthase (CV-DN) in macrophages. from Stage 12 embryos For (E) control (n=24 embryos) vs CV-DN (n=20) p=0.0032. For (F) control (n=21 embryos) vs CV-DN (n=17) p=0.003. Data information: show Stage 12 embryos. Mean±SEM, **p<0.01, ***p<0.001, ****p<0.0001. Unpaired t-tests Confocal images of germband macrophages in control embryos and those expressing different RNAis against mitochondrial OxPhos Complex III (or an RNAi against Complex V. Data information: show Stage 12 embryos. Complex III RNAis target Cyt-c1, UQCR-cp1-2, for Complex V, ATP synthase F1F0. Scale bars: 50µm quantification of germband macrophages in control embryos and those expressing different RNAis against mitochondrial OxPhos Complex III (or an RNAi against Complex V. For (H) control (n=34 embryos) vs Complex III RNAi 1 (n=20) p=0.0001; vs. Complex III RNAi 2 (n=18) p=0.027; vs. Complex III RNAi 3 (n=16) p<0.0001; vs. Complex V RNAi (n=14) p<0.0001. Data information: show Stage 12 embryos. Complex III RNAis target Cyt-c1, UQCR-cp1-2, for Complex V, ATP synthase F1F0. Mean±SEM, **p<0.01, ***p<0.001, ****p<0.0001. one-way ANOVA with Tukey's (H). I Single plane confocal microscope image during germband entry from control or atosPBG embryos, or those expressing pths-RNAi or CV-DN in macrophages. Antibodies against S293-phosphorylated inactivated Pyruvate Dehydrogenase (pPDH, green) or total PDH (magenta) in macrophages (red). Higher pPDH levels are usually found when ATP/ADP levels are high and input into the TCA cycle is being downregulated Data information: show Stage 12 embryos. Scale bars: 10µm J Quantification of normalized pPDH/PDH levels calculated from fluorescence intensities in macrophages from the genotypes in (I) during initial germband invasion. The pPDH/PDH ratio is significantly reduced, arguing that decreased function of CV, Atos or Pths in macrophages results in lower cellular ATP/ADP ratios compared to the control. N=3 independent experiments. Ctrl 1 (n=10 embryos) vs CV-DN (n=9) and vs. atos mutant (n=13) both p=0.0002; Ctrl 2 (n=7 embryos) vs pths RNAi (n=8) p=0.0001.*** shown above columns in J are for comparison to relevant control. Data information: Mean±SEM, **p<0.01, ***p<0.001, ****p<0.0001. Unpaired t-tests