What is an LB amp plate?

What is an LB amp plate?

Application. LB agar plate is used to culture bacteria in microbiology research. These plates are commonly used during cloning experiments to amplify antibiotic-resistant, competent bacteria. The addition of agar to LB medium helps form a gel that allows bacteria to grow.

How many amps do I need for LB media?

Preparation of LB-Ampicillin Agar The final concentration of ampicillin in LB-Ampicillin agar should be 50 µg/ml. To make 500 ml of LB agar containing 50 µg/ml ampicillin, add 2.5 ml of 10 mg/ml ampicillin stock. Ensure LB agar is cooled to 50°C before adding ampicillin, excessive heat will degrade the ampicillin.

How do you make agar amps with LB plates?


  1. 500 mL makes about one sleeve of petri dishes.
  2. Add 25g LB Broth per Liter to an appropriately sized beaker.
  3. Add Water and Stir until clumps are gone.
  4. Add 15 g Agar per Liter , this will not dissolve.
  5. Transfer to a erlenmeyer flask at least 2x the volume that you are making.

What kind of medium is LB amp?

LB Amp is Lysogeny Broth (LB) containing the antibiotic ampicillin. Because LB is a rich medium for growing bacteria, adding ampicillin provides a means of selecting transformants that have taken up plasmid DNA containing the bla gene, which encodes resistance to ampicillin.

Why are LB plates used?

Luria-Bertani (LB) agar plates are nutrient-rich plates used for growing bacteria on. They are commonly used during cloning experiments to amplify antibiotic-resistant, competent bacteria.

What is LB media used for?

LB medium is a rich medium that is commonly used to culture members of the Enterobacteriaceae as well as for coliphage plaque assays. LB and related media (SOC, Terrific Broth, 2xYT, etc) are used extensively in recombinant DNA work and other molecular biology procedures.

Does +pGLO LB amp glow?

LB/amp/ara/+pGLO (+pGLO) growing on agar that has both ampicillin and arabinose added to it. expect to see green glowing bacteria in this plate.

How much does it cost to make a 45-pound plate?

Smaller weights will be pricier per pound, with 2.5 pounders running you anywhere from $5-16. Heavier weights will often cost less per pound — a 45-pound plate should cost anywhere from $45-80.

How long do LB plates last?

You should not store your plates for longer than 1 month at any temperature and should always check for contamination prior to use. Assuming the appropriate strains were streaked on the appropriate plates, then if both strains grow, it’s possible that: The antibiotic broke down.

What is the pH of LB?

The pH of LB* is routinely near 9.

What is the purpose of the LB amp ARA agar plate?

What is the purpose of the LB/amp/ara agar plate? It is a selective medium with an antibiotic which prevents growth of non-resistant cells and a sugar that allows for the expression of a plasmid gene.