1LSQ

RIBONUCLEASE A WITH ASN 67 REPLACED BY A BETA-ASPARTYL RESIDUE

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	13709.3	2	UniProt (P61823) Pfam (PF00074) In PDB	Bos taurus (cattle)
2	A, B	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
3		water	water		18.0	114	Chemie (HOH)

Sequence modifications

A, B: 1 - 124 (UniProt: P61823)

PDB	External Database	Details
Ias 67	Asn 93	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	27418.6
Non-Polymers*	Number of molecules	2
	Total formula weight	192.1
All*	Total formula weight	27610.7

*Water molecules are not included.