Biotinidase Deficiency, also known as late-onset multiple carboxylase deficiency, is related to biotin deficiency and metabolic acidosis, and has symptoms including apnea, ataxia and diarrhea. An important gene associated with Biotinidase Deficiency is BTD (Biotinidase), and among its related pathways/superpathways are Metabolism and Fatty acid metabolism. The drugs Biotin and Folic acid have been mentioned in the context of this disorder. Affiliated tissues include skin and brain, and related phenotypes are organic aciduria and metabolic ketoacidosis