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authorBonface2024-02-13 23:52:26 -0600
committerMunyoki Kilyungi2024-08-09 13:30:43 +0300
commitb2feda451ccfbeaed02dce9088d6dd228cf15861 (patch)
tree3dd2883524985114070a7770cd2e9f9bd7eb1848 /general/datasets/Oncretilm6_0412/experiment-design.rtf
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downloadgn-docs-b2feda451ccfbeaed02dce9088d6dd228cf15861.tar.gz
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+<p>Expression profiling by array</p>
+
+<p>We used pooled RNA samples of retinas, usually two independent pools--two male, two female pool--for most lines of mice.</p>
+
+<p>All normalization was performed by William E. Orr in the HEI Vision Core Facility</p>
+
+<ol>
+ <li>Computed the log base 2 of each raw signal value</li>
+ <li>Calculated the mean and standard Deviation of each Mouse WG-6 v2.0 array</li>
+ <li>Normalized each array using the formula, 2 (z-score of log2 [intensity]) The result is to produce arrays that have a mean of 8, a variance of 4, and a standard deviation of 2. The advantage is that a two-fold difference in expression level corresponds approximately to a 1 unit difference.</li>
+ <li>computed the mean of the values for the set of microarrays for each strain. Technical replicates were averaged before computing the mean for independent biological samples.</li>
+</ol>