a, Distribution of % oxidation status of BAT protein thiols ± acute cold exposure. b, Pathway analysis of BAT proteins containing cysteine residues sensitive to substantial oxidation (>10% shift in oxidation status) upon cold exposure. (Top) Proteins clustered according to shared GO enrichment terms. (Bottom) Significantly enriched pathways. c, Immunodetection of protein sulfenic acid levels in BAT ± acute cold exposure (n = 4) d, Effect of i.p. NAC on core body temperature following acute cold exposure (n = 8; 500 mg/kg NAC n = 7). e, VO2 consumed 3 hrs pre and post i.p. CL ± NAC (control n = 12; NAC n = 9). VCL = vinculin. Data are mean ± s.e.m. of at least four mouse replicates. *P < 0.05, **P < 0.01, ***P<0.001 (two-tailed Student’s t-test for pairwise comparisons, one-way/two-way ANOVA for multiple comparisons involving one/two independent variables).