4AH2: HLA-DR1 with covalently linked CLIP (106-120) in its canonical orientation
Image from the RCSB PDB (www.rcsb.org) of PDB ID 4AH2 (Schlundt, A., Gunther, S., Sticht, J., Wieczorek, M., Roske, Y., Heinemann, U., Freund, C.) (2012) Peptide Linkage to the Alpha-Subunit of Mhcii Creates a Stably Inverted Antigen Presentation Complex. J.Mol.Biol. 423: 294