They demonstrated a change in gut microbiome independent of obesity by knocking out resistin-like molecule beta (RELMβ) in mice, a colonic goblet cell-specific gene whose expression is heavily dependent on the gut microbiome, and subjugated the mice to a high-fat diet (HFD), which normally induces RELMβ expression [36]. The gene discussed is RETNLB; the disease is obesity disorder.