1SEM

STRUCTURAL DETERMINANTS OF PEPTIDE-BINDING ORIENTATION AND OF SEQUENCE SPECIFICITY IN SH3 DOMAINS

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	SEM-5	polymer	58	6799.5	2	UniProt (P29355) Pfam (PF00018) In PDB	Caenorhabditis elegans
2	C, D	10-RESIDUE PROLINE-RICH PEPTIDE FROM MSOS (ACE-PRO-PRO-PRO-VAL-PRO-PRO-ARG-ARG-ARG)	polymer	10	1100.3	2		Mus musculus (house mouse)
3		water	water		18.0	67	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	15799.7
All*	Total formula weight	15799.7

*Water molecules are not included.