Multiple Assemblies exist for SMTL entry 2x4n
Crystal structure of MHC CLass I HLA-A2.1 bound to residual fragments of a photocleavable peptide that is cleaved upon UV-light treatment; X-RAY DIFFRACTION 2.34 Å

	SMTL ID 2x4n.1 Ligands HLA-A2.1-RESTRICTED INFLUENZA A MATRIX EPITOPE; GLYCEROL Polypeptides HLA CLASS I HISTOCOMPATIBILITY ANTIGEN, A-2 ALPHA CHAIN; BETA-2-MICROGLOBULIN Oligo-state hetero-1-1-mer
	SMTL ID 2x4n.2 Ligands HLA-A2.1-RESTRICTED INFLUENZA A MATRIX EPITOPE; GLYCEROL; 2-(N-MORPHOLINO)-ETHANESULFONIC ACID Polypeptides HLA CLASS I HISTOCOMPATIBILITY ANTIGEN, A-2 ALPHA CHAIN; BETA-2-MICROGLOBULIN Oligo-state hetero-1-1-mer