(A,B) Requirement for glutamine in UK5099-induced energy expenditure. Primary brown adipocytes were pre-treated with vehicle (DMSO) or 100 nM UK5099 for 2 h. OCR were measured in presence of either 5 mM glucose and 3 mM glutamine or 5 mM glucose alone. Norepinephrine (NE; 1 µM), oligomycin A (Oligo; 4 µM), etomoxir (Eto; 40 µM) and antimycin A (AA; 4 µM) were injected where indicated. (A) Representative OCR traces averaging 6 technical replicates. (B) Quantification of non-stimulated OCR, NE-stimulated OCR, ATP-linked OCR, mitochondrial proton leak and etomoxir-sensitive OCR after vehicle or UK5099 treatment as shown in (A) from n=4 individual experiments. 