4G9A

Crystal structure of calcium2+-bound wild-type CD23 lectin domain

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D (A, B, C, D)	Low affinity immunoglobulin epsilon Fc receptor	polymer	143	16165.0	4	UniProt (P06734) Pfam (PF00059)	Homo sapiens (human)	BLAST-2, C-type lectin domain family 4 member J, Fc-epsilon-RII, Immunoglobulin E-binding factor, Lymphocyte IgE receptor, Low affinity immunoglobulin epsilon Fc receptor membrane-bound form, Low affinity immunoglobulin epsilon Fc receptor soluble form
2	E, G, J (A, B, D)	GLYCEROL	non-polymer		92.1	3	Chemie (GOL)
3	F, H, I, K (A, B, C, D)	CALCIUM ION	non-polymer		40.1	4	Chemie (CA)
4	L, M, N, O (A, B, C, D)	water	water		18.0	404	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	64659.9
Non-Polymers*	Number of molecules	7
	Total formula weight	436.6
All*	Total formula weight	65096.5

*Water molecules are not included.