
-   GeneCards (human): [https://www.genecards.org/cgi-bin/carddisp.pl?gene=APOA4](https://www.genecards.org/cgi-bin/carddisp.pl?gene=APOA4)
-   Harmonizome (human): [https://maayanlab.cloud/Harmonizome/gene/APOA4](https://maayanlab.cloud/Harmonizome/gene/APOA4)
-   NCBI (human): [https://www.ncbi.nlm.nih.gov/gene/337](https://www.ncbi.nlm.nih.gov/gene/337)
-   NCBI (rat): [https://www.ncbi.nlm.nih.gov/gene/25080](https://www.ncbi.nlm.nih.gov/gene/25080)
-   Ensemble (human): [https://useast.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000110244](https://useast.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000110244)
-   Ensemble (rat): [https://useast.ensembl.org/Rattus_norvegicus/Gene/Summary?g=ENSRNOG00000055909](https://useast.ensembl.org/Rattus_norvegicus/Gene/Summary?g=ENSRNOG00000055909)
-   Rat Genome Database (rat): [https://rgd.mcw.edu/rgdweb/report/gene/main.html?id=2132](https://rgd.mcw.edu/rgdweb/report/gene/main.html?id=2132)
-   Uniprot (human): [https://www.uniprot.org/uniprotkb/P06727](https://www.uniprot.org/uniprotkb/P06727)
-   Uniprot (rat): [https://www.uniprot.org/uniprotkb/P02651](https://www.uniprot.org/uniprotkb/P02651)
-   Wikigenes (human): [https://www.wikigenes.org/e/gene/e/337.html](https://www.wikigenes.org/e/gene/e/337.html)
-   Wikigenes (rat): [https://www.wikigenes.org/e/gene/e/25080.html](https://www.wikigenes.org/e/gene/e/25080.html)
-   Alphafold (human): [https://alphafold.ebi.ac.uk/entry/P06727](https://alphafold.ebi.ac.uk/entry/P06727)
-   Alphafold (rat): [https://alphafold.ebi.ac.uk/entry/P02651](https://alphafold.ebi.ac.uk/entry/P02651)
-   PDB (human): [https://www.rcsb.org/structure/3S84](https://www.rcsb.org/structure/3S84)
-   PDB (mouse): none
-   PDB (rat): none
