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Labeled glutamine-derived metabolites. (A-G) Mass isotopomer analysis of glutamate, α-ketoglutarate, isocitrate, citrate, fumarate, malate and oxaloacetate in 4T1/Cas9, 4T1/PKM-KO, 4T1/KO+hPKM1 and 4T1/KO+hPKM2 cells cultured with 13C5-glutamine for 8 h.
