The gene encoding GDP-L-fucose: .beta.-D-Galactoside 2-.alpha.-L-fucosyltransferase has been cloned, and a mutation in this gene has been found to be responsible for an individual being a non-secretor.
This invention was made in part with Government support under Grant No. HL48859 awarded from the National Institute of Health and Grant No. W-7405-ENG-48 awarded from the Department of Energy. The U.S. government has certain rights in this invention.