Update publication information. Histidyl dipeptides, such as carnosine, present in a micro-millimolar ranges in the heart, are synthesized via the enzyme carnosine synthase (Carns). These dipeptides facilitate glycolysis by proton buffering, form conjugates with reactive aldehydes, such as acrolein, and attenuate ischemia and reperfusion injury. While these dipeptides exhibit multifunctional properties, a composite understanding of their roles in myocardium is lacking. To identify the landscape of histidyl dipeptide mediated responses in the heart, we used a triomics approach of genome wide RNA sequencing, global proteomics and unbiased metabolomics in the cardio specific Carns transgenic (Tg) mice and integrated the three data sets.