Update lamassu-fam.md

Lamassu Fam add DdmABC subtypes of lamassu

content/3.defense-systems/lamassu-fam.md

@@ -30,7 +30,7 @@ Lamassu has been suggested to be a large family of defense systems, that can be
 
 These systems all encode the *lmuB* gene, and in most cases also comprise *lmuC*. In addition to these two core genes, Lamassu systems of various subtypes encode a third protein, hypothesized to be the Abi effector protein :ref{doi=10.1101/2022.05.11.491447}. This effector  can be proteins encoding endonuclease domains, SIR2-domains, or even hydrolase domains :ref{doi=10.1016/j.chom.2022.09.017}. Systems of the extended Lamassu-family can be found in 10% of prokaryotic genomes :ref{doi=10.1016/j.chom.2022.09.017}.
 
-Lamassu were also described as DdmABC in *Vibrio cholerae* :ref{doi=10.1038/s41586-022-04546-y,10.1101/2022.11.18.517080}. They were found to be antiplasmids and thus to eliminate plasmids from seventh pandemic *Vibrio cholerae* :ref{doi=10.1038/s41586-022-04546-y}.
+Lamassu were also described as DdmABC in *Vibrio cholerae* :ref{doi=10.1038/s41586-022-04546-y,10.1101/2022.11.18.517080}. They were found to be antiplasmids and thus to eliminate plasmids from seventh pandemic *Vibrio cholerae* :ref{doi=10.1038/s41586-022-04546-y}. The DdmABC system corresponds to a Lamassu-Fam Cap4 nuclease system.
 
 ## Molecular mechanism