SLC39 refers to a family of genes known as solute carrier family 39, which encode proteins that function as transporters for essential metals like zinc and manganese. These transporters play a crucial role in maintaining metal homeostasis in cells, which is vital for various biological processes, including enzyme function and cellular signaling. The SLC39 family includes several members, such as SLC39A1 and SLC39A2, each with specific roles in metal uptake and distribution. Dysregulation of these transporters can lead to health issues, including zinc deficiency and related disorders, highlighting their importance in nutrition and cellular health.