AbiN was discovered in *Lactococcus lactis* subsp. cremoris S114 in 1998 :ref{doi=10.1016/S0378-1097(98)00002-0}.
AbiN 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}. AbiN is classified as unknown for abortive infection phenotype in :ref{doi=10.1016/j.mib.2023.102312}.
AbiN is a single gene system composed of the protein AbiN.
## Molecular mechanism
As far as we are aware, the molecular mechanism is unknown.