2PI4

T7RNAP complexed with a phi10 protein and initiating GTPs.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	T	5'-D(*CP*TP*TP*CP*CP*TP*AP*TP*AP*GP*TP*GP*AP*GP*TP*CP*GP*TP*AP*TP*TP*A)-3'	polymer	22	6732.4	1
2	P	5'-D(*TP*AP*AP*TP*AP*CP*GP*AP*CP*TP*CP*AP*CP*T)-3'	polymer	14	4223.8	1
3	A	DNA-directed RNA polymerase	polymer	878	98410.6	1	UniProt (P00573) Pfam (PF14700) Pfam (PF00940) In PDB	Enterobacteria phage T7
4	A	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
5	A	3'-DEOXY-GUANOSINE-5'-TRIPHOSPHATE	non-polymer		507.2	2	Chemie (GH3)
6		water	water		18.0	129	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	109366.7
Non-Polymers*	Number of molecules	4
	Total formula weight	1063.0
All*	Total formula weight	110429.7

*Water molecules are not included.