C4d DNA sequences of two infrequent human allotypes (C4A13 and C4B12) and the presence of signal sequences enhancing recombination

1. Martínez-Quiles, N.
2. Paz-Artal, E.
3. Moreno-Pelayo, M.A.
4. Longás, J.
5. Ferre-López, S.
6. Rosal, M.
7. Arnaiz-Villena, A.