1R3M

Crystal structure of the dimeric unswapped form of bovine seminal ribonuclease

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, seminal	polymer	124	13632.6	2	UniProt (P00669) Pfam (PF00074)	Bos taurus (cattle)	Seminal RNase, S-RNase, Ribonuclease BS-1
2	C, D (A, B)	PHOSPHATE ION	non-polymer		95.0	2	Chemie (PO4)
3	E, F (A, B)	water	water		18.0	101	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	27265.3
Non-Polymers*	Number of molecules	2
	Total formula weight	189.9
All*	Total formula weight	27455.2

*Water molecules are not included.