Beta-Aminoisobutyric Aciduria, also known as beta-aminoisobutyric acid, urinary excretion of, is related to body mass index quantitative trait locus 1 and heart disease. An important gene associated with Beta-Aminoisobutyric Aciduria is AGXT2 (Alanine--Glyoxylate Aminotransferase 2). Affiliated tissues include skeletal muscle and bone, and related phenotype is beta-aminoisobutyric aciduria.