Fig. 7. The effects of temperature on GLUT1 expression in heart. Atlantic cod were either held at 8°C (N=10) or allowed to follow ambient seawater temperatures (N=10). Fish were sampled in early June when ambient seawater temperature had risen to 4°C after an average temperature of –0.5°C over the winter months. GLUT1 mRNA levels were analyzed by northern blot and normalized to 28S rRNA levels.