2CEX
Structure of a sialic acid binding protein (SiaP) in the presence of the sialic acid acid analogue Neu5Ac2en
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)  | PROTEIN HI0146 | polymer | 306 | 34203.7 | 4 | UniProt (P44542) Pfam (PF03480)  | HAEMOPHILUS INFLUENZAE | SIAP | 
| 2 | E, I, J, K, L... (A, B, C, D)  | ZINC ION | non-polymer | 65.4 | 6 | Chemie (ZN) | |||
| 3 | F (B)  | 2-DEOXY-2,3-DEHYDRO-N-ACETYL-NEURAMINIC ACID | non-polymer | 291.3 | 1 | Chemie (DAN) | |||
| 4 | G, H, M (B, D)  | GLYCEROL | non-polymer | 92.1 | 3 | Chemie (GOL) | |||
| 5 | O, P, Q, R (A, B, C, D)  | water | water | 18.0 | 455 | Chemie (HOH) | 
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 4 | 
| Total formula weight | 136815.0 | |
| Non-Polymers* | Number of molecules | 10 | 
| Total formula weight | 960.0 | |
| All* | Total formula weight | 137775.0 | 






