Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 4 |
| Details | BINDING SITE FOR RESIDUE K A 501 |
| Chain | Residue |
| A | P33502 |
| A | PEG503 |
| A | HOH731 |
| A | HOH732 |
| site_id | AC2 |
| Number of Residues | 6 |
| Details | BINDING SITE FOR RESIDUE P33 A 502 |
| Chain | Residue |
| A | HOH739 |
| A | TRP273 |
| A | TRP379 |
| A | K501 |
| A | PEG503 |
| A | HOH732 |
| site_id | AC3 |
| Number of Residues | 3 |
| Details | BINDING SITE FOR RESIDUE PEG A 503 |
| Chain | Residue |
| A | K501 |
| A | P33502 |
| A | HOH731 |
| site_id | AC4 |
| Number of Residues | 2 |
| Details | BINDING SITE FOR RESIDUE K B 501 |
| Chain | Residue |
| B | P33502 |
| B | PEG503 |
| site_id | AC5 |
| Number of Residues | 5 |
| Details | BINDING SITE FOR RESIDUE P33 B 502 |
| Chain | Residue |
| B | TYR198 |
| B | K501 |
| B | PEG503 |
| B | HOH650 |
| B | HOH737 |
| site_id | AC6 |
| Number of Residues | 2 |
| Details | BINDING SITE FOR RESIDUE PEG B 503 |