“…The DLA genes belong to either MHC class I or MHC class II. Class I genes were initially defined by serology, while class II genes were based on mixed lymphocyte reactivity (Bull et al, 1987;Vriesendorp et al, 1971Vriesendorp et al, , 1973Vriesendorp, 1979). Several sequence-based studies of canine MHC type I genes have been reported (Burnett et al, 1997;Graumann et al, 1998;Wagner et al, 1999).…”