2I6S

Complement component C2a

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	Complement C2a fragment	polymer	517	58464.5	1	UniProt (P06681) Pfam (PF00092) Pfam (PF00089)	Homo sapiens (human)
2	B (B)	beta-D-mannopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[beta-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose	branched		732.7	1	In PDB GlyTouCan (G27503UT)
3	C (C)	beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	branched		586.5	1	In PDB GlyTouCan (G15407YE)
4	D (D)	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	branched		424.4	1	In PDB GlyTouCan (G42666HT)
5	E, F (A)	2-acetamido-2-deoxy-beta-D-glucopyranose	non-polymer		221.2	2	Chemie (NAG)
6	G (A)	water	water		18.0	38	Chemie (HOH)

Sequence modifications

A: 224 - 732 (UniProt: P06681)

PDB	External Database	Details
His 216	-	expression tag
His 217	-	expression tag
His 218	-	expression tag
His 219	-	expression tag
His 220	-	expression tag
His 221	-	expression tag
Gly 222	-	cloning artifact
Ser 223	-	cloning artifact

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	58464.5
Branched	Number of molecules	3
	Total formula weight	1743.6
Non-Polymers*	Number of molecules	2
	Total formula weight	442.4
All*	Total formula weight	60650.5

*Water molecules are not included.