12FK

Ancestral Reconstruction of a Homing Endonuclease

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	aHE31	polymer	306	34917.2	1		synthetic construct
2	B (B)	DNA (5'-D(P*GP*AP*AP*CP*CP*TP*TP*TP*GP*GP*TP*TP*AP*TP*GP*AP*GP*GP*AP*TP*CP*TP*TP*C)-3')	polymer	24	7390.8	1		synthetic construct
3	C (C)	DNA (5'-D(P*TP*GP*AP*AP*GP*AP*TP*CP*CP*TP*CP*AP*TP*AP*AP*CP*CP*AP*AP*AP*GP*GP*TP*T)-3')	polymer	24	7346.8	1		synthetic construct
4	D, E (A)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA) PubChem (271)
5	F, G, H (A, B, C)	water	water		18.0	301	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	49654.8
Non-Polymers*	Number of molecules	2
	Total formula weight	80.2
All*	Total formula weight	49734.9

*Water molecules are not included.