2C7U

Conflicting selective forces affect CD8 T-cell receptor contact sites in an HLA-A2 immunodominant HIV epitope.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, D	HLA CLASS I HISTOCOMPATIBILITY ANTIGEN, A-2 ALPHA CHAIN	polymer	276	31951.3	2	UniProt (P01892) Pfam (PF00129) Pfam (PF07654) UniProt (by SIFTS) (P04439) In PDB	HOMO SAPIENS (HUMAN)	HLA-A2, MHC CLASS I ANTIGEN A*2
2	B, E	BETA-2-MICROGLOBULIN	polymer	100	11879.4	2	UniProt (P61769) Pfam (PF07654) In PDB	HOMO SAPIENS (HUMAN)
3	C, F	GAG PROTEIN	polymer	9	977.2	2	UniProt (O11822) Pfam (PF00540) In PDB	HUMAN IMMUNODEFICIENCY VIRUS 1
4		water	water		18.0	219	Chemie (HOH)

Sequence modifications

B, E: 0 - 0 (PDB: 2C7U)
B, E: 1 - 99 (UniProt: P61769)

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	89615.7
All*	Total formula weight	89615.7

*Water molecules are not included.