An intriguing approach54 has explored exploitation via LSF in an in vivo mouse model of colorectal cancer that has been precolonizedwith Fn. Azide-displaying Fn-selectivephages were generated by “culturing” the phage insidea F. nucleatum bacteria in which azidohomoalanine(Aha) was added to the culture media, resulting in incorporation ofazides into the phage. This evidence concerns the gene FN1 and colorectal cancer.