4AEN: HLA-DR1 with covalently linked CLIP (106-120) in its flipped orientation
Image from the RCSB PDB (www.rcsb.org) of PDB ID 4AEN (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