MT-CYB and Obesity: In 2003, Okura et al (21) reported that a specific SNP in the mt-CytB gene (mt.15497G>A) may be associated with obesity, body size composition and regional body fat distribution in middle-aged and elderly Japanese subjects, but according to Liguori et al (22), there is no relationship between this polymorphism and obesity in adult Caucasian subjects (Table 3).