HLA-C and congestive heart failure: At 6 months of age CHF induced a significant slow‐to‐fast shift in MHC composition, as indicated by the significantly higher fast MHC‐2B content, with concomitant significantly lower contents of MHC‐1 and MHC‐2A, observed in Tg‐CTRL in comparison with WT‐CTRL (Fig. 2).