PCR of our OV What is PCR again? I forgot… Preparing for PCR Running a PCR.

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Presentation transcript:

PCR of our OV What is PCR again? I forgot… Preparing for PCR Running a PCR

Steps in the Polymerase Chain Reaction - PCR p. 2A-2

Making a cDNA Library Open the plasmid with enzyme Ligate in cDNA and transform But how big is the insert? How can we “see” the size of the cDNA?

Wolffia cDNA Insert

Getting ready for PCR…. To see the size we need to do PCR and amplify enough that we can see the actual fragment. Remember that DNApol needs somewhere to START replication….you need specific PRIMERS Add specific primers that flank the insert region.

p. 2A-3 Polylinker Region of TriplEX2 Wolffia cDNA

You need to dilute aliquots of your overnight culture (which contains plasmid DNA) 40-fold. Take 5  l of overnight culture in your labeled microtube (200ul H 2 O). Mix each sample tube by tapping the side with your finger. You need to dilute aliquots of your overnight culture (which contains plasmid DNA) 40-fold. Take 5  l of overnight culture in your labeled microtube (200ul H 2 O). Mix each sample tube by tapping the side with your finger. Overnights to PCR

Mixing a PCR Reaction Every PCR reaction needs 1. Template DNA- something to amplify 2. Free nucleotides- so that we can make more DNA 3. DNA Polymerase- an enzyme to do the replication process 4. Primers- to direct DNA replication 5. Buffers- so that everything works In groups of 4 you will be making a Master mix for PCR for all four members of your group. Master Mix Recipe for four group members In a microtube labeled MM Add 90 ul sterile water Add 12.5 uL of FOR primer Add 12.5 ul of REV primer Mix gently by tapping Spin if necessary In a microtube labeled MM Add 90 ul sterile water Add 12.5 uL of FOR primer Add 12.5 ul of REV primer Mix gently by tapping Spin if necessary M Do not add bacteria This tube is for your group

After your group has made the MM, see me for a PCR tube Your PCR tube ALREADY contains a dehydrated stock of: enzyme, buffer, and free nucleotides You will need to label the tube CAREFULLY And you will add MM and your DNA from diluted OV You will need to label the tube CAREFULLY And you will add MM and your DNA from diluted OV M PCR tube Add 23ul of MM to your own PCR tube Then add 2ul of diluted OV culture Total vol. 115ul

PCR tubes One for each group member LABEL! PCR tubes One for each group member LABEL!