BIOS 390 WEEK 6: LAB: isolate Plasmid DNABIOS 390 BIOS .
BIOS 390 WEEK 6: LAB: isolate Plasmid DNA
Once a plasmid has been introduced into competent bacterial cells and the cells have grown into colonies on a medium selective for cells containing the plasmid, the next step is to perform a min...
bios 390 bios bios 390 week 6 lab isolate plasmid dna once a plasmid has been introduced into competent bacterial cells and the cells have grown into colonies on a medium selective for cells con
Written for
Devry University
BIOS 390
All documents for this subject (32)
Seller
Follow
10SALES
Reviews received
Content preview
WEEK 5 & 6: LAB BIOS390 ERIC KYLE
BIOS .
WEEK 6: LAB: isolate Plasmid DNA
Once a plasmid has been introduced into competent bacterial cells and the cells have grown into
colonies on a medium selective for cells containing the plasmid, the next step is to perform a
miniprep of the plasmid DNA in preparation for DNA sequencing. The three steps are: 1)
growing cells in liquid culture; 2) purifying the plasmid DNA from the culture; and 3)
performing a restriction digest on the purified DNA to determine whether the DNA insert in the
plasmid is the expected size. To start the liquid culture, cells from an isolated bacterial colony
are placed in selective medium (nutrient broth with an antibiotic to which the plasmid provides
resistance). This placing of the cells into the medium is called inoculation. It is important to
choose a single isolated colony from the plate, so that the liquid culture will contain cells that all
have the same plasmid. If cells from more than one colony are used for inoculation, the miniprep
may contain multiple plasmids and the mixed DNA will not be useful for sequencing. The cells
that have grown overnight are harvested by centrifugation and the plasmid DNA is purified. The
purification is a multistep process designed to separate plasmid DNA from genomic DNA
(gDNA) and other cellular components.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller 10SALES. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £0.00. You're not tied to anything after your purchase.