Figure 2. OX-KO mice display cold intolerance. Core body temperature of 8–10-week-old OX KO and wild-type littermates during 6 h exposure to cold (4°C). (A) Expression changes in transcripts known to be important for brown adipose tissue (BAT) thermogenesis in OX KO mice. (B) Thermal images using an infrared camera, of the surface temperature of the interscapulary region of OX KO and wild-type mice following 6 h exposure to a temperature of 4°C for 6 h (C).