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M1D3: PCR and Paper Discussion 2/12/15
1. Upcoming office hours:
• Tomorrow, 3-5pm + Sunday, 3-5pm in 16-319
• No office hours on Monday (Holiday)
• Wednesday, 3-5pm + by email
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•First lab treat: !
!
!
•Homework — long due to Holiday !
•PCR Review, Gel Electrophoresis & Cloning basics !
•Set up PCR !
•Atissa will be here, then journal club! !
Announcements
Another source of DNA for our studies
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Mod1 Major Assignments
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1. Larger than usual — put that long weekend to good use!
• Experiment #1 (gull microbiota) — your own experimental schematic diagram (to be included in your Abstract & Data Summary assignment)
• Experiment #1 (gull microbiota): Methods section practice — DNA purification and PCR
• Experiment #2: (AIV detection)— a publishable table including your primer sequence and details (to be included in your Memo assignment)
• M1D4 ligation calculation
Homework Assignment
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A Methods section is not a protocol:
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Methods(sec*on(exercise(
• Consider(the(following(passage:(“Template(DNA((5(ng)(and(primers(were(mixed(with(20(uL(of(2.5X(Master(Mix(in(a(PCR(tube.(Water(was(added(to(50(uL.(A(tube(without(template(was(prepared(and(labeled(control.(”(– What(informa*on(is(missing?(– What(informa*on(can(be(cut?(
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Bird Microbial Communities -- Experimental Overview
1517 bp __!1300 bp __!
ladder! gull!
Cloacal
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First three rounds of PCR:
(1)
(2)
(3)
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PCR$
Component( Func,on(
Catalyzes DNA addition
Select and initiate new sequence
Optimal chemical environment
Building Blocks
Original Copy
M1D3: 16S rRNA gene amplification — PCR
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DNA$Electrophoresis$(EP):$Principle$Agarose$gel$ DNA$
Driving$force$for$separa9on:$
DNA$moves$$$$to$$$$because$of$$$$$
Separa9on$is$according$to:$
$__________$$$$DNA$moves$faster$because$
Agarose$and$DNA$are$both$
Thanks to Agi for this slide!
Preview of M1D4: DNA Electrophoresis
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1517 bp __!1300 bp __!
ladder! gull!
How do we visualize the DNA?
www.base-asia.com
http://en.wikibooks.org/wiki/Structural_Biochemistry/DNA_Gel_Electrophoresis
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DNA$EP:$Analysis$
DNA$ladder:$$
Rela2onship:$$
From MIT OCW
Preview of M1D4: Analysis
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Preview of M1D4: Cloning
Vector = Plasmid = Circular DNA
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Preview of M1D4: Cloning
You may have done this before:
You can also do it this way:
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Bird Microbial Communities -- Review of Overview
Cloacal
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Today in Lab: M1D3
1. Set-up PCR reactions
• Use filtered pipette tips. Change your pipette tip after every step.
• Keep the PCR tubes cold. Label with marker (not sticker!) 2. Finish up draft of slide (2 max!) for Koenig et al paper 3. Atissa here to talk Journal Club presentations (~2:45pm) 4. You ‘fix’ your slide based on Atissa’s talk (~10-15min) 5. Class wide journal club practice (~3:45pm)
• We will discuss the structure and content of the paper AND provide feedback on your presentation