May function in the secretion of milk-fat droplets. May act as a specific membrane-associated receptor for the association of cytoplasmic droplets with the apical plasma membrane (By similarity). Inhibits the proliferation of CD4 and CD8 T-cells activated by anti-CD3 antibodies, T-cell metabolism and IL2 and IFNG secretion.
Specificity
Natural and recombinant Mouse Butyrophilin subfamily 1 member A1
Subcellular Location
Membrane Single-pass type I membrane protein Secreted in association with the milk-fat-globule membrane during lactation.