The Bcl I polymorphism of the human uncoupling protein (ucp) gene is due to a point mutation in the 5'-flanking region. - Cassard-Doulcier,A.M.; Bouillaud,F.; Chagnon,M.; Gelly,C.; Dionne,F.T.; Oppert,J.M.; Bouchard,C.; Chagnon,Y.; Ricquier,D. (Int J Obes Relat Metab Disord, 1996)