CKMT1B and obesity due to melanocortin 4 receptor deficiency: With this, the infrequent alleles of the variants rs76220640 (p.Pro112 =) and rs146047573 (p.Tyr269Cys) located in CKB, the CKMT1B variant rs9571's allele (p.Lys352 =) as well as the allele of the GATM-located variant rs747005297 (p.His292Arg) were nominally associated with obesity.