RexAB
The RexAB is composed of 2 proteins: RexA and RexB.
Here is an example found in the RefSeq database:
The RexAB system in Klebsiella pneumoniae (GCF_016780145.1, NZ_CP068798) is composed of 2 proteins RexB (WP_032749558.1) RexA (WP_077270569.1)
graph LR;
Parma_1992[Parma et al., 1992] --> Origin_0
Origin_0[Escherichia coli lambda prophage
NP_040626.1, NP_040627.1] --> Expressed_0[Escherichia coli]
Expressed_0[Escherichia coli] ----> T4 & Lamboidphages
subgraph Title1[Reference]
Parma_1992
end
subgraph Title2[System origin]
Origin_0
end
subgraph Title3[Expression species]
Expressed_0
end
subgraph Title4[Protects against]
T4
Lamboidphages
end
style Title1 fill:none,stroke:none,stroke-width:none
style Title2 fill:none,stroke:none,stroke-width:none
style Title3 fill:none,stroke:none,stroke-width:none
style Title4 fill:none,stroke:none,stroke-width:none