Summary
Among λN - DNA - defective lysogens able to give the antiimmune phase mutations have been found which do not affect appreciably lysogenization frequency and plaque turbidity, but show a rex - phenotype. These mutations complement classical rex - mutations, which map on the left side of the immunity region, and seem to imply a role of CI product in rex function.
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Nasi, S., Paolozzi, L. & Calef, E. Mutations in the CI gene of lambda bacteriophage which retain immunity and confer a rex - phenotype. Molec. gen. Genet. 130, 297–305 (1974). https://doi.org/10.1007/BF00333868
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DOI: https://doi.org/10.1007/BF00333868