|   | 3 Dee - Database of Protein Domain Definitions | 
| Classes | % of representative set | 
|---|---|
| undefined | 8.33 | 
| Small proteins | 8.33 | 
| Alpha and beta (a+b) | 8.33 | 
| All alpha | 75.00 | 
| 2dtr-2 | [seq. related domains] | All alpha | Diphtheria toxin repressor (DtxR) dimerization domain | 
| 2bpgb-3 | [seq. related domains] | Alpha and beta (a+b) | Nucleotidyltransferases Domain II | 
| 1d66b-2 | [seq. related domains] | All alpha | Oligomers of long helices | 
| 1pyib-2 | [seq. related domains] | All alpha | Oligomers of long helices | 
| 1au7b-1 | [seq. related domains] | All alpha | lambda repressor-like DNA-binding domains | 
| 1lmb4-1 | [seq. related domains] | All alpha | lambda repressor-like DNA-binding domains | 
| 1adr-1 | [seq. related domains] | All alpha | lambda repressor-like DNA-binding domains | 
| 2r63-1 | [seq. related domains] | All alpha | lambda repressor-like DNA-binding domains | 
| 1ner-1 | [seq. related domains] | All alpha | lambda repressor-like DNA-binding domains | 
| 2nlla-1 | [seq. related domains] | Small proteins | Glucocorticoid receptor-like (DNA-binding domain) | 
| 2yhx-1 | [seq. related domains] | All alpha | Hexokinase all helical domain | 
| 1af7-1 | [seq. related domains] | undefined | undefined |