AbiJ was discovered in 1997 on a *Lactococcus lactis* biovar. diacetylactis :ref{doi=10.1111/j.1574-6968.1997.tb10185.x}.
AbiJ is one of the so-called "Abi" systems for "Abortive infection" discovered in the 90's in research related to the dairy industry :ref{doi=10.1016/j.mib.2005.06.006}. AbiJ is classified as abortive infection in :ref{doi=10.1016/j.mib.2023.102312}.
AbiJ is composed of one protein AbiJ. AbiJ has some homology with [AbiC](/defense-systems/abic)(PF14355).
## Molecular mechanism
As far as we are aware, the molecular mechanism is unknown.