This increase in DMT-1 gene expression indicates that the system is still responsive to the iron deficiency caused by the DMT-1 mutation but that the mutation keeps the Belgrade animal from increasing its iron absorption (Bowen and Morgan 1987; Edwards et al. 1980; Farcich and Morgan 1992; Garrick et al. 1993). Here, SLC11A2 is linked to Iron deficiency anemia.