Table 2.
Families of Asp boxes containing proteins detected from searches of protein sequence databases
| Family | Name | Max. no. repeats | Phyletic distribution |
| 1 | Sialidases, neuraminidases | 5 | Bacteria, Eukarya |
| 2 | Reelin | 16 | Eukarya |
| 3 | Vps10p/Pep1p, sortilin, LR11 | 13 | Eukarya |
| 4 | 2 Salmonella ORFs | 4 | Bacteria |
| 5 | Avicelase III homologs | 7 | Bacteria |
| 6 | Unc-6, netrins, laminin N-terminal domains | 1 | Eukarya |
| 7 | YCF48, HCF136 | 4 | Bacteria, Eukarya |
| 8 | Endo-levanases, sucrase, fructanase | 2 | Bacteria |
| Others | slr1403, phage neuraminidase, unknown ORFs, vrlC, S-layer repressor, cell surface proteinase | Various | Archaea, Bacteria, Eukarya |