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Piotr Prostko committed Nov 9, 2022
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378 changes: 186 additions & 192 deletions CONSTANd_vs_medianSweeping.html

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Expand Up @@ -11,7 +11,7 @@

<meta name="author" content="Piotr Prostko, Joris Van Houtven" />

<meta name="date" content="2022-11-05" />
<meta name="date" content="2022-11-08" />

<title>Strategies for the analysis of isobarically labeled samples in mass spectrometry-based proteomics</title>

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<h1 class="title toc-ignore">Strategies for the analysis of isobarically
labeled samples in mass spectrometry-based proteomics</h1>
<h4 class="author">Piotr Prostko, Joris Van Houtven</h4>
<h4 class="date">November 05, 2022</h4>
<h4 class="date">November 08, 2022</h4>

</div>

Expand Down Expand Up @@ -2019,17 +2019,24 @@ <h2><span class="header-section-number">3.1</span> Filtering and
preparation</h2>
<p>In the file <code>data_prep.R</code> you can find the details of all
data preparation steps. Here, we list which PSMs were discarded or
modified and why: 1. Use only data from Runs 1, 2, 4, 5. 1. Discard
reference samples (TMT channels 126 and 131). 1. Discard PSMs with
shared peptides (as done in <a href="https://doi.org/10.1074/mcp.RA120.002105">Ting et al.</a>). 1. Add
simulated variability (see next section). 1. Reconstruct missing MS1
Intensity column based on MS2 intensities (necessary for some component
variants). 1. Discard duplicate PSMs due to the use of multiple search
engine instances (which only change the score). 1. Discard PSMs of
proteins that appear both in the background and spike-in. 1. Discard
PSMs with Isolation Interference (%) &gt; 30. 1. Discard PSMs with NA
entries in the quantification channels. 1. Discard PSMs of
one-hit-wonder proteins.</p>
modified and why:</p>
<ol style="list-style-type: decimal">
<li><p>Use only data from Runs 1, 2, 4, 5.</p></li>
<li><p>Discard reference samples (TMT channels 126 and 131).</p></li>
<li><p>Discard PSMs with shared peptides (as done in <a href="https://doi.org/10.1074/mcp.RA120.002105">Ting et
al.</a>).</p></li>
<li><p>Add simulated variability (see next section).</p></li>
<li><p>Reconstruct missing MS1 Intensity column based on MS2 intensities
(necessary for some component variants).</p></li>
<li><p>Discard duplicate PSMs due to the use of multiple search engine
instances (which only change the score).</p></li>
<li><p>Discard PSMs of proteins that appear both in the background and
spike-in.</p></li>
<li><p>Discard PSMs with Isolation Interference (%) &gt; 30.</p></li>
<li><p>Discard PSMs with NA entries in the quantification
channels.</p></li>
<li><p>Discard PSMs of one-hit-wonder proteins.</p></li>
</ol>
</div>
<div id="simulated-biological-variability" class="section level2" number="3.2">
<h2><span class="header-section-number">3.2</span> Simulated biological
Expand Down Expand Up @@ -2628,7 +2635,7 @@ <h2><span class="header-section-number">3.4</span> Technical details on
that we will now briefly discuss.</p>
<div id="input-data" class="section level3" number="3.4.1">
<h3><span class="header-section-number">3.4.1</span> input data</h3>
<p>The <a href="util/data_prep.R">data_prep.R</a> script process the
<p>The <a href="util/data_prep.R">data_prep.R</a> script processes the
data in a way required by our notebook files. This file has been written
such that it fits the particular dataset used in our manuscript. With a
little bit of effort, however, one can modify it such that it can become
Expand Down Expand Up @@ -2807,8 +2814,9 @@ <h3><span class="header-section-number">3.4.1</span> input data</h3>
how the resulting data should look like:</p>
<pre class="r"><code>temp &lt;- readRDS(&quot;data/input_data.rds&quot;)

# dat.l
display_dataframe_head(temp$dat.l)</code></pre>
cat(&quot;dat.l&quot;)</code></pre>
<pre><code>## dat.l</code></pre>
<pre class="r"><code>display_dataframe_head(temp$dat.l)</code></pre>
<div style="border: 1px solid #ddd; padding: 5px; overflow-x: scroll; width:100%; ">
<table class="table" style="margin-left: auto; margin-right: auto;">
<thead>
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</tbody>
</table>
</div>
<pre class="r"><code># dat.w
display_dataframe_head(temp$dat.w)</code></pre>
<pre class="r"><code>cat(&quot;dat.w&quot;)</code></pre>
<pre><code>## dat.w</code></pre>
<pre class="r"><code>display_dataframe_head(temp$dat.w)</code></pre>
<div style="border: 1px solid #ddd; padding: 5px; overflow-x: scroll; width:100%; ">
<table class="table" style="margin-left: auto; margin-right: auto;">
<thead>
Expand Down Expand Up @@ -3737,6 +3746,8 @@ <h3><span class="header-section-number">3.4.1</span> input data</h3>
</tbody>
</table>
</div>
<pre class="r"><code>cat(&quot;data.params&quot;)</code></pre>
<pre><code>## data.params</code></pre>
<pre class="r"><code>temp$data.params</code></pre>
<pre><code>## $referenceCondition
## [1] &quot;0.5&quot;
Expand Down Expand Up @@ -3793,8 +3804,8 @@ <h3><span class="header-section-number">3.4.2</span> Notebook
<h3><span class="header-section-number">3.4.3</span> Master program</h3>
<p>We also prepared an R script with which it is possible to
conveniently knit all notebooks from the level of one file. This program
is called <code>data/master_program.R</code>. This program refers to the
notebook parameter described above.</p>
is called <code>data/master_program.R</code>, and inside you will find
references to the R markdown parameters explained above.</p>
</div>
<div id="install-the-required-r-packages" class="section level3" number="3.4.4">
<h3><span class="header-section-number">3.4.4</span> Install the
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