作者单位:Univ Leon, Inst Desarrollo Ganadero, Campus Vegazana, E-24071 Leon, Spain[1]Univ Leon, Inst Biomed IBIOMED, Campus Vegazana, E-24071 Leon, Spain[2]Univ Valencia, Dept Biol Celular, E-46100 Burjassot, Spain[3]Univ Leon, Dept Biol Mol, Campus Vegazana, E-24071 Leon, Spain[4]