1AAR

STRUCTURE OF A DIUBIQUITIN CONJUGATE AND A MODEL FOR INTERACTION WITH UBIQUITIN CONJUGATING ENZYME (E2)

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	DI-UBIQUITIN	polymer	76	8576.8	2	UniProt (P62990) Pfam (PF00240) UniProt (by SIFTS) (P0CH28) In PDB	Bos taurus (cattle)
2		water	water		18.0	15	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	17153.7
All*	Total formula weight	17153.7

*Water molecules are not included.