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<h2>About PubChem
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<h3>Data Sources</h3>
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<p>Data sources are who supplies chemical data to PubChem. Data sources can directly submit chemical information to PubChem or PubChem will proactively add relevant chemical information from data sources.</p>
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<a href="img/PubChem_Sources.png" target="_blank"><img class="img-fluid" src="img/PubChem_Sources.png" alt="PubChem Data Sources graphic showing Academic Labs, Governmental Agencies, Chemical Supply, Pharmaceutical Companies, Journal Publishers, and Individual Researchers pointing at the PubChem logo."></a>
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<p>To browse the data sources that have contributed to PubChem, click <a href="https://pubchem.ncbi.nlm.nih.gov/source/" target="_blank">here</a> or on the <strong>Explore Data Sources</strong> link located below the PubChem search box, next to the statistcs.</p>
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<br>
<p>On the Data Sources page, search for a specific source or filter sources according to:</p>
<ul><li><strong>Data Type</strong> (covered later in this tutorial)</li>
<li><strong>Source Category</strong> (the type of source, like a chemical vendor or journal publisher)</li>
<li><strong>Source Status</strong> (if the source is actively contributing data or is a <a href="https://pubchemdocs.ncbi.nlm.nih.gov/legacy-designation" target="_blank">legacy source</a>)</li>
<li><strong>Source Country</strong></li>
</ul>
<br>
<h4><i class="fas fa-user-edit"></i> Exercises</h4>
<div>
<p>Open the <a href="https://pubchem.ncbi.nlm.nih.gov/source/" target="_blank">PubChem Data Sources page</a> and answer the following questions:</p>
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<li><strong>True or False? Chemical vendors contribute data to PubChem.</strong></li>
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a) True
</label>
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b) False
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<p><strong>a) True.</strong> (Hint: Locate the &quot;Source Category&quot; list of filters. Are chemical vendors listed as a type of category?)
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b) False
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<p><strong>b) False.</strong> (Hint: Locate the &quot;Source Country&quot; map or list of filters. Is the United States the only country listed?)
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<br>
<h4><i class="fas fa-user-edit"></i> Exercises</h4>
<div>
<p>You can also view details about specific data sources by searching for a source on this page. Find the search box located at the top of the page. Type <strong>Chemotion</strong> into the search box. As you type, PubChem will automatically start showing relevant results. (Hint: dont forget to clear any filters!)</p>
<p>Click on the <strong>Chemotion</strong> link and explore its record to answer the following questions:</p>
<div class="card shadow-sm">
<div class="card-body">
<ol class="pubmed-numbers p-l-0">
<li><strong>Which country does Chemotion operate from?</strong></li>
</ol>
<br>
<div class="form-check mb-2">
<input class="form-check-input" type="radio" name="flexRadioDefaultQ3" id="flexRadioDefault5">
<label class="form-check-label" for="flexRadioDefault5">
a) Germany
</label>
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<input class="form-check-input" type="radio" name="flexRadioDefaultQ3" id="flexRadioDefault6">
<label class="form-check-label" for="flexRadioDefault6">
b) United States
</label>
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<div class="form-check mb-2">
<input class="form-check-input" type="radio" name="flexRadioDefaultQ3" id="flexRadioDefault7">
<label class="form-check-label" for="flexRadioDefault7">
c) United Kingdom
</label>
</div>
<div class="form-check mb-2">
<input class="form-check-input" type="radio" name="flexRadioDefaultQ3" id="flexRadioDefault8">
<label class="form-check-label" for="flexRadioDefault8">
d) China
</label>
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<p><strong>a) Germany.</strong> (Hint: Look for the map or address to see where Chemotion is located. Also, make sure youre spelling Chemotion correctly.)
</p>
</div>
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<button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
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<br>
<div class="card shadow-sm">
<div class="card-body">
<ol class="pubmed-numbers p-l-0" style="counter-reset: my-counter 1">
<li><strong>What type of data does Chemotion contribute to PubChem? </strong></li>
</ol>
<br>
<div class="form-check mb-2">
<input class="form-check-input" type="radio" name="flexRadioDefaultQ4" id="flexRadioDefault9">
<label class="form-check-label" for="flexRadioDefault9">
a) Annotations
</label>
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<input class="form-check-input" type="radio" name="flexRadioDefaultQ4" id="flexRadioDefault10">
<label class="form-check-label" for="flexRadioDefault10">
b) Live Substances
</label>
</div>
<div class="form-check mb-2">
<input class="form-check-input" type="radio" name="flexRadioDefaultQ4" id="flexRadioDefault11">
<label class="form-check-label" for="flexRadioDefault11">
c) Live BioAssay
</label>
</div>
<div class="form-check mb-2">
<input class="form-check-input" type="radio" name="flexRadioDefaultQ4" id="flexRadioDefault12">
<label class="form-check-label" for="flexRadioDefault12">
d) Pathways
</label>
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<h5 class="modal-title" id="Exercise4ModalLabel">Answer</h5>
<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close">
</button>
</div>
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<p><strong>b) Live Substances.</strong> (Hint: On the Chemotion summary page, look at the &quot;Data in PubChem&quot; row. What type of data is listed?)
</p>
</div>
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<p><strong>Next, we will review the different types of data in PubChem.</strong></p>
<p><strong>Note: You can return to the PubChem search box from any page by clicking either the:</strong></p>
<ol>
<li><strong>PubChem logo</strong></li>
<li><strong>Search PubChem button in the upper right-hand corner of the screen</strong></li>
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