|   | 3 Dee - Database of Protein Domain Definitions | 
| Classes | % of representative set | 
|---|---|
| undefined | 50.00 | 
| Alpha and beta (a+b) | 25.00 | 
| All beta | 25.00 | 
| 1bncb-4 | [seq. related domains] | All beta | Barrel-sandwich hybrid | 
| 1hdj-1 | [seq. related domains] | undefined | undefined | 
| 1tpt-3 | [seq. related domains] | Alpha and beta (a+b) | Thymidine phosphorylase Domain III | 
| 1qapb-1 | [seq. related domains] | undefined | undefined |