| IPR036834 | Bcl-2-like superfamily | Homologous Superfamily |
| IPR004725 | Apoptosis regulator, Bcl-2/ BclX | Family |
| IPR003093 | Apoptosis regulator, Bcl-2 protein, BH4 | Domain |
| IPR002475 | Bcl2-like | Family |
| IPR020731 | Apoptosis regulator, Bcl-2, BH4 motif, conserved site | Conserved Site |
| IPR013279 | Apoptosis regulator, Bcl-X | Family |
| IPR020728 | Apoptosis regulator, Bcl-2, BH3 motif, conserved site | Conserved Site |
| IPR020726 | Apoptosis regulator, Bcl-2, BH2 motif, conserved site | Conserved Site |
| IPR046371 | Bcl-2, Bcl-2 homology region 1-3 | Domain |
| IPR026298 | Bcl-2 family | Family |
| IPR020717 | Apoptosis regulator, Bcl-2, BH1 motif, conserved site | Conserved Site |
| IPR012346 | p53/RUNT-type transcription factor, DNA-binding domain superfamily | Homologous Superfamily |
| IPR002117 | p53 tumour suppressor family | Family |
| IPR013872 | p53 transactivation domain | Domain |
| IPR036674 | p53-like tetramerisation domain superfamily | Homologous Superfamily |
| IPR011615 | p53, DNA-binding domain | Domain |
| IPR008967 | p53-like transcription factor, DNA-binding domain superfamily | Homologous Superfamily |
| IPR010991 | p53, tetramerisation domain | Domain |
| IPR040926 | Cellular tumor antigen p53, transactivation domain 2 | Domain |