1RBB

THE CRYSTAL STRUCTURE OF RIBONUCLEASE B AT 2.5-ANGSTROMS RESOLUTION

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	RIBONUCLEASE B	polymer	124	13708.3	2	UniProt (P61823) Pfam (PF00074)	Bos taurus (cattle)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	27416.7
All*	Total formula weight	27416.7

*Water molecules are not included.