Body Mass Index Quantitative Trait Locus 20, also known as obesity, resistance to, is related to body mass index quantitative trait locus 11 and leptin deficiency or dysfunction. An important gene associated with Body Mass Index Quantitative Trait Locus 20 is MC4R (Melanocortin 4 Receptor). The drugs Metyrapone and Indapamide have been mentioned in the context of this disorder. Affiliated tissues include skeletal muscle and liver, and related phenotypes are obesity and hyperinsulinemia