2RCJ

Solution structure of human Immunoglobulin M

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, E, F, I...	IgA1 light chain	polymer	218	23165.8	10	Pfam (PF07654) UniProt (by SIFTS) (Q6PYX1) In PDB	Homo sapiens (human)
2	C, D, G, H, K...	IgA1 heavy chain	polymer	523	56759.5	10	Pfam (PF07654) UniProt (by SIFTS) (P01857) In PDB	Homo sapiens (human)
3	U	J chain	polymer	104	10700.0	1		Homo sapiens (human)

Contents of the asymmetric unit

Polymers	Number of chains	21
	Total formula weight	809952.8
All*	Total formula weight	809952.8

*Water molecules are not included.