Problem with experimental validation.
Says: Penner et al 95 and E. coli system in E. coli.
But I think , this paper is more relevant
https://onlinelibrary.wiley.com/doi/full/10.1111/j.1365-2958.2008.06387.x
Here system come from Geobacillus kaustophilus.
But i did not see any antiphage activity.
Check what I did to explain and see how you want to deal with it !
