Selection of Ampicillin-Resistant Transformants: Isolates colonies of Escherichia coli carrying AmpR plasmids (100 µg/mL ampicillin) after transformation.

Plasmid Cloning and Maintenance: Supports routine cloning workflows and stable propagation of AmpR plasmids in Escherichia coli.

Colony Screening and Picking: Enables picking colonies for downstream minipreps, PCR verification, and Sanger sequencing of inserts.

Recombinant Protein Expression Workflows: Selects and maintains expression strains harboring AmpR expression vectors prior to induction in liquid culture.

CFU Enumeration with Selection: Quantifies viable AmpR transformants or transconjugants under antibiotic pressure.

Conjugation/Mating Selections: Selects for transfer of plasmids bearing beta-lactam resistance markers after bacterial mating experiments.

Glycerol Stock Preparation from Pure Colonies: Provides selective single colonies for long-term cryostorage of AmpR strains.

Strain Purity and Contamination Checks: Confirms purity of AmpR Escherichia coli cultures on a selective solid medium.

Verification of Resistance Cassettes: Screens constructs containing beta-lactam resistance cassettes for correct function prior to downstream use.

Animal-Free Microbial Workflows: Supports animal-component–free selection and growth for regulatory or ethical requirements in microbial production.