The present invention provides, in particular embodiments, for modifiedrecombinant T cell receptor (TCR) ligands (RTLs) comprising a MHC class I orMHC class II component. The modified RTLs have redesigned surface featuresthat preclude or reduce aggregation, wherein the modified molecules retain theability to bind Ag-peptides, target antigen-specific T cells, inhibit T cellproliferation in an Ag-specific manner and have utility to treat, inter alia,autoimmune disease and other conditions mediated by antigen-specific T cellsin vivo.