Sam:LabNotes/Microbiome-new/2010-1-28

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Revision as of 09:21, 31 January 2010 by >Sam Chiang (→‎Procedure)
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16S LD-PCR 40cycle amplification for Sanger sequencing

Backgorund

  • I identified two possible positive amplicons by 16S-LD PCR validation. However the PCR products concentration might be too low for sequencing.
  • By doing Size selection + 2nd PCR amplification, I can get enough specific PCR product for sequencing.

Procedure

Taq-Gold(ABI) recipe
                       1rxn       4+1rxn  
-----------------------------------------
H2O                   13.5        67.5
10X buf                2.0        10.0
MgCl2                  2.0        10.0
Primer(10uM)           1.0         5.0 - Microseq_16S 
dNTP(10mM)             0.4         2.0
Taq-Gold Enzyme        0.1         0.5
--------------------------------------
                      19.0        95.0    95/5=19   template-1uL 

Template (1uL): 11-1, 11-2, 12-1, 12-2
11-1, 12-1: 1uL eliqote from 20uL size selected 1st PCR amplicons
11-2, 12-2: 1uL eliqote from 1st PCR amplicons

Results

  • 1uL 2nd-PCR amplicons were varified by 2% agarose gel
    • Sample well: 1uL sample + 5uL 0.5X TBE + 2uL 6X loading dye
    • Ladder: 5uL pre-diluted 1kb-plus ladder
File:Sam012810-2nd PCR.jpg