6I2G

ALFA-tag binding nanobody (NbALFA) bound to ALFA-tag peptide.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	ALFA nanobody	polymer	124	13599.2	1		Vicugna pacos
2	B (B)	N7P-SER-ARG-LEU-GLU-GLU-GLU-LEU-ARG-ARG-ARG-LEU-THR-GLU-LPD	polymer	15	1926.2	1		synthetic construct
3	C, D (A)	SULFATE ION	non-polymer		96.1	2	Chemie (SO4)
4	E, F (A, B)	water	water		18.0	118	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	15525.4
Non-Polymers*	Number of molecules	2
	Total formula weight	192.1
All*	Total formula weight	15717.5

*Water molecules are not included.