An enzymatic basis for blood type B in humans.

@article{Kobata1968AnEB,
  title={An enzymatic basis for blood type B in humans.},
  author={Akira Kobata and Evelyn F. Grollman and Victor Ginsburg},
  journal={Biochemical and biophysical research communications},
  year={1968},
  volume={32 2},
  pages={272-7}
}