1AFL

RIBONUCLEASE A IN COMPLEX WITH 5'-DIPHOSPHOADENOSINE 2'-PHOSPHATE AT 1.7 ANGSTROM 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	RIBONUCLEASE A	polymer	124	13708.3	2	UniProt (P61823) Pfam (PF00074) In PDB	Bos taurus (cattle)
2	A, B	2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE	non-polymer		507.2	2	Chemie (ATR)
3	A, B	CITRIC ACID	non-polymer		192.1	2	Chemie (CIT)
4		water	water		18.0	122	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	27416.7
Non-Polymers*	Number of molecules	4
	Total formula weight	1398.6
All*	Total formula weight	28815.3

*Water molecules are not included.