Bacterial immune systems. such as CRISPR-Cas or restriction-modification (R-M) systems. affect bacterial pathogenicity and antibiotic resistance by modulating horizontal gene flow. A model system for CRISPR-Cas regulation. https://www.bekindtopets.com/mega-grab-Freetress-Crochet-Braid-DEEP-TWIST-14-Inch-save-more/