Dual-Antibiotic Plasmid Selection: Selects and maintains cat- and kan-bearing plasmids in E. coli and other lab strains under 34 µg/mL chloramphenicol and 50 µg/mL kanamycin.

Co-Transformation Screening: Isolates colonies that successfully acquired multiple constructs requiring simultaneous chloramphenicol and kanamycin resistance.

Genomic Engineering Selection: Recovers edits made with cat and kan cassettes (e.g., recombineering or CRISPR workflows) on solid LB medium.

Library Maintenance: Sustains pooled or arrayed strain/plasmid libraries that rely on both chloramphenicol and kanamycin markers.

Conjugation/Mating Counterselection: Selects transconjugants carrying dual-resistance markers after bacterial mating experiments.

Colony Isolation and Enumeration: Plates, isolates, and counts transformants on 1.5% agar LB with defined dual-antibiotic pressure.

Animal-Free Microbial Culture: Supports growth and selection of E. coli, Bacillus subtilis, and similar bacteria in animal-free LB formulations.