Title
Tackling a Legendary Scientific Mystery: Elucidation of the Bacteriophage Lambda T4rII Exclusion Phenotype,Used
Delivery time: 8-12 business days (International)
The T4rII exclusion (Rex) Phenotype is defined as the inability of rII mutants of bacteriophage T4 to generate plaques on a cell lawn of E. coli harboring a stably integrated lambda prophage. The selective exclusion of the rII mutants of T4 played a critical role in our understanding of modern molecular genetics. Shockingly, since first exploited by Seymour Benzer in the mid 1950's, the mechanism underpinning the Rex phenotype remains unexplained. T4rII exclusion is encoded by the lambda genes rexArexB coexpressed with the lambda repressor from the prophage as the PmcIrexArexBtimm operon. The onset of exclusion can result in the shutdown of cellular metabolism, preventing the replication of the superinfecting T4rII bacteriophage. In addition to reviewing the historic plight to characterize and resolve the Rex phenotype, we tackle this enigmatic phenomenon, adding important pieces to this puzzle and offer a working model for the mechanism of action.
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Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Secure Payment
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.