Version July 2025
| Prefix | Target substem (also called Infix)* | Source substem (omitted in mAbs named after 2017)¶ | SuffixΔ | ||
| Substem | Definition | Substem | Definition | ||
| Random and distinctive | -ami | Serum amyloid protein (SAP)/amyloidosis | -a | Rat | All products named before 2022:
Products named from 2022 onward use one of the following:
|
| -ba | Bacterial | -axo | Rat-mouse | ||
| -ci | Cardiovascular | -e | Hamster | ||
| -eni | Enzyme inhibition | -i | Primate | ||
| -fung | Fungal | -o | Mouse | ||
| -gro | Skeletal muscle mass related growth factors and receptors | -u | Human | ||
| -ki | Cytokine and cytokine receptors | -xi | Chimeric | ||
| -ler | Allergen | -xizu | Chimeric-humanized | ||
| -ne | Neural | -zu | Humanized | ||
| -os | Bone | ||||
| -pru | Immunosuppressive | ||||
| -sto | Immunostimulatory | ||||
| -toxa | Toxin | ||||
| -ta | Tumor | ||||
| -vet | Veterinary use | ||||
| -vi | Viral | ||||
mAb: monoclonal antibody.
* The final letter could be omitted if it interfered with pronunciation.
¶ Non-human species are no longer used due to high immunogenicity.
Δ Changes to the suffix were made in 2022 to reduce sound-alikes and to specify the immunoglobulin structure.