3DNI

CRYSTALLOGRAPHIC REFINEMENT AND STRUCTURE OF DNASE I AT 2 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	DEOXYRIBONUCLEASE I	polymer	260	29092.6	1	UniProt (P00639) Pfam (PF03372) In PDB	Bos taurus (cow)
2	B	alpha-D-galactopyranose-(1-6)-beta-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-6)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	branched		1235.1	1	In PDB GlyTouCan (G18559HW)
3	A	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
4		water	water		18.0	375	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	29092.6
Branched	Number of molecules	1
	Total formula weight	1235.1
Non-Polymers*	Number of molecules	2
	Total formula weight	80.2
All*	Total formula weight	30407.8

*Water molecules are not included.