Multiple products of class Ib Qa-2 genes which ones are functional?

@article{Stroynowski1996MultiplePO,
  title={Multiple products of class Ib Qa-2 genes which ones are functional?},
  author={Iwona Stroynowski and Piotr Tabaczewski},
  journal={Research in immunology},
  year={1996},
  volume={147 5},
  pages={290-301}
}