A porcine cosmid library was screened with a human MHC class I cDNA. F
our positive clones were isolated and mapped with different restrictio
n endonucleases. Altogether nine SLA class I genes were identified and
their positions located within restriction maps. Sizes of class I hom
ologous DNA sequences varied between 3600 and 5800 bp. The distances b
etween these regions ranged from 11 900 to 22 200 bp.