4ZB4

Spliceosome component

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Pre-mRNA-processing factor 19	polymer	360	40688.7	2	UniProt (P32523) In PDB	Saccharomyces cerevisiae (Baker's yeast)	WD40
2		water	water		18.0	131	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	81377.4
All*	Total formula weight	81377.4

*Water molecules are not included.