B4GALT1 and breast cancer: It has also been found that the total mRNA level of β1,4-galactosyltransferase-1 (β4GalT1), an enzyme that catalyzes the transfer of galactose from UDP-Gal to GlcNAc and forms the poly-N-acetyllactosamine structure, was significantly higher in BC tissues than in normal ones [153].