DR1 and influenza: Hartman et al. describe the application of the CFS method to four proteins: (1) an artificial construct of influenza H1N1 (A/PR/8/34) HA with a single, well-known DR1-restricted epitope (A/Texas/1/77 HA306–318) appended to the C-terminus; (2) Collagen type II; (3) influenza H5N1 (A/Vietnam/1203/2004) HA and (4) Liver stage malaria antigen.