MnSOD, Trx1, and apoptotic proteins are modulated in advanced heart failure. Atrial myocardial homogenates were prepared from the recipient and donor heart sample. (A) Expression of MnSOD, Trx1, Bax, Bcl-xL, acetyl-p53, p53 (total) and tubulin was evaluated by immunoblots. The level of donor heart is expressed as 1. (B) Representative immunoblots.