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oxfordfeb162012:start [2015/11/09 16:46] magierooxfordfeb162012:start [2015/11/09 19:59] (current) magiero
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 • [0342] Using this dataset a consensus is constructed using the **landmark process** outlined earlier.  The difference at SNP location 337 is clear.\\ • [0342] Using this dataset a consensus is constructed using the **landmark process** outlined earlier.  The difference at SNP location 337 is clear.\\
 {{consensus.png?500}} {{consensus.png?500}}
 +• [0343] SNP of populations 51-60 gathered from consensus is clear in the figure below.\\
 +{{snppop.png?500}}
  
 === - Identification of a Number of Populations [0344]-[0347] === === - Identification of a Number of Populations [0344]-[0347] ===
 +• [0345] Experiments on 2 and 3 simulated species were done.  That is populations of 2 and 3 different DNA samples were fed into the machine.  Pairwise alignment is used to obtain similarity scores and hence a **similarity tree** is made by **neighbour joining**.\\
 +{{tree2.png?300 }} {{ tree3.png?300}}
 +• [0347] Identifications (as in example 2) were run for both experiments identifying the population distributions (see histograms).
 +{{hist2.png?250 }} {{ hist3.png?250}}
  
 === - Assembly of a Library [0348]-[0351] ===  === - Assembly of a Library [0348]-[0351] === 
 +• [0349] Using the 1-18 overlapping strands mentioned above (but without the extra common pattern tacked on to both ends of each strand).\\
 +• [0350] A tree by **neighbour joining** on **pairwise alignment** scores was constructed.\\
 +• [0350] Since relatively large non-similar regions were expected, a scoring function that does not penalize gaps at the beginning or end of the alignment as strongly as those within alignment was used (see result below).\\
 +{{libtree.png?300}}
 +• [0350] All sequences have similar relation to two other sequences representing the ~100 base overlap on either side.\\
 +• [0351] Progressing through the tree in order of relatedness:
 +  - consensus landmarks for the aligned sequences are constructed
 +  - the landmark from that alignment then serves as the feature vector for alignment with the next sequence
 +  - output of the process is a fully assembled feature vector
 +
oxfordfeb162012/start.1447087584.txt.gz · Last modified: 2015/11/09 16:46 by magiero

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