Has the focus on GAS mimicry of myosin blinded us to other forms of epitope mimicry against cell surface targets such as the beta 1 adrenergic receptor (B1AR) that has been identified as a possible autoimmune target in dilated cardiomyopathies (DCM) (56–59)? The gene discussed is ADRB1; the disease is dilated cardiomyopathy.