2UUN
Crystal structure of C-phycocyanin from Phormidium, Lyngbya spp. (Marine) and Spirulina sp. (Fresh water) shows two different ways of energy transfer between two hexamers.
Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords | 
| 1 | A, C, E, G, I... (A, C, E, G, I...)  | C-PHYCOCYANIN | polymer | 162 | 17263.3 | 12 | LEPTOLYNGBYA SP. | ||
| 2 | B, F, H, J, L... (B, F, H, J, L...)  | C-PHYCOCYANIN | polymer | 172 | 17798.1 | 11 | LEPTOLYNGBYA SP. | ||
| 3 | D (D)  | C-PHYCOCYANIN | polymer | 172 | 17826.2 | 1 | LEPTOLYNGBYA SP. | ||
| 4 | AB, BA, BB, CA, CB... (T, C, D, U, V...)  | PHYCOCYANOBILIN | non-polymer | 588.7 | 35 | Chemie (CYC) | |||
| 5 | AA (B)  | BILIVERDINE IX ALPHA | non-polymer | 582.6 | 1 | Chemie (BLA) | |||
| 6 | AC, IB, JB, KB, LB... (X, A, C, D, E...)  | water | water | 18.0 | 375 | Chemie (HOH) | 
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 24 | 
| Total formula weight | 420764.6 | |
| Non-Polymers* | Number of molecules | 36 | 
| Total formula weight | 21186.9 | |
| All* | Total formula weight | 441951.6 | 






