(D) Grouping E. rectale individuals from the Danish (DK) and Swedish (SE) studies, based on this deletion shows a significant (*p < 0.05, **p < 0.01, ***p < 0.001) increase in BMI and blood fasting insulin levels as well as a decrease in overall community diversity in individuals who are predominantly colonised by the flagellum carrying subspecies (see Methods). The same trend is observed for E. eligens subspecies in the same studies, though not statistically significant (n.s.). 