Difference between revisions of "Julia Jan 12"

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http://www.bio.davidson.edu/courses/Bio343/LabMethods_2016.html
 
  
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http://gcat.davidson.edu/mediawiki-1.19.1/index.php/Burmese_Python_RNAseq_Project
 
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http://gcat.davidson.edu/mediawiki-1.19.1/index.php/Julia_Preziosi
 
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Glossary of terms: http://gcat.davidson.edu/GcatWiki/index.php/Blueberry_Genome_Project_for_Bio343#A
 
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Notes: (RNA seq protocol pdf + For Davidson pptx)
 
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Don’t want to give RNA time to degrade. Tubes, -40C baths.
 
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Protocol :
 
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.1 g of tissue = 100micrograms
 
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Shave off tissue, RNA isolation kit.
 
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How do we know the right part of the organ was sampled? only desired organ harvested? Room for Error
 
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1. Poly[A] enrichment
 
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used a poly-T oligonucleotides (since mRNA has a string of AAAAs) attached to beads (this isolates mRNA from other RNA
 
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2. RNA fragmentation
 
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only about 75 bases can be read.
 
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Advantage of fragmenting RNA before cDNA: randomly fragmented the long mRNA = can get a lot more reads, more edges to read 75 in from. Roughly the same size.
 
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Don’t sequence RNA ; use cDNA (complementary DNA) (transcribed the mRNA)
 
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Reverse Transcriptase enzyme; uses RNA as template to make DNA
 
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Primer: how to prime every cDNA (with infinite combo of sequences)
 
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ACACTCTTTCCCTACACGACGCTCTTCCGATCTNxxxNNNNNN
 
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Hexamer with every possible combination to attach to the cDNA.           
 
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Temps cool enough so that every attachment will occur when it can.
 
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Every possible sequence accounted for in this situation.
 
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3.
 
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cut out a certain molecular weight from gel purification; reamplify 500bp ; considered a good library (pptx)
 
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Tasked to figure out if there’s a gene transcribed for the three fed snakes that’s not in the three unfed snakes, from the many 75bp results (which are disassembled).
 
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Do you know what you did and can you describe it?
 

Latest revision as of 18:36, 14 January 2016