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    <p>Hi Lidia,</p>
    <p>The answer will depend on the number of genes in your list. For a
      list with up to 500 genes, you can use the Biomart tool: <br>
    </p>
    <p><a class="moz-txt-link-freetext" href="https://www.ensembl.org/biomart/martview">https://www.ensembl.org/biomart/martview</a></p>
    <p>There is a tutorial for using the BioMart tool here:</p>
    <p><a class="moz-txt-link-freetext" href="https://www.ensembl.org/info/data/biomart/index.html">https://www.ensembl.org/info/data/biomart/index.html</a></p>
    <p>Alternatively, for larger gene lists you could use the REST API:</p>
    <p><a class="moz-txt-link-freetext" href="http://rest.ensembl.org/">http://rest.ensembl.org/</a></p>
    <p>You will need to use the GET xref/id endpoint to retreive all
      external references associated with your genes of interest.
      Documentation this endpoint can be found on the following page:<br>
    </p>
    <p><a class="moz-txt-link-freetext" href="http://rest.ensembl.org/documentation/info/xref_id">http://rest.ensembl.org/documentation/info/xref_id</a><br>
    </p>
    <p>Best wishes</p>
    <p>Ben<br>
    </p>
    <div class="moz-cite-prefix">On 20/01/2022 12:05, Lidia Ryabova
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:20220120120735.ECD6C11805D_1E95087B@hh-mx4.ebi.ac.uk">
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        <div>Dear Admin, may I ask you to help me to find a sources on
          how to add  entrazID and Symbol gene to ensembl gene list
          please?</div>
        <div>Could you possibly redirect me to some tutorial or codes
          that already exist please?<br>
        </div>
        <div>-- <br>
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                    <div dir="ltr">With kind regards 
                      <div><br>
                        <div><i>Dr Lidia Ryabova, MD,</i><span
                            style="font-family:"Arial
                            Narrow",sans-serif;font-size:10pt"> MSc
                            (Moscow)  </span></div>
                        <div><span style="font-family:"Arial
                            Narrow",sans-serif;font-size:10pt"><br>
                          </span></div>
                        <div><span style="font-family:"Arial
                            Narrow",sans-serif;font-size:10pt"><br>
                          </span></div>
                        <div><br>
                        </div>
                        <div style="font-size:12.8px">
                          <p><span style="font-family:"Arial
                              Narrow",sans-serif;font-size:10pt">Centre
                              for  Molecular Medicine and Biobanking </span></p>
                          <p><span style="font-family:"Arial
                              Narrow",sans-serif;font-size:10pt">Biomedical
                              science building  </span></p>
                          <p><span style="font-family:"Arial
                              Narrow",sans-serif;font-size:10pt">Room 
                              331</span></p>
                        </div>
                        <div style="font-size:12.8px">
                          <p><span style="font-family:"Arial
                              Narrow",sans-serif;font-size:10pt">The
                              University of Malta,</span></p>
                        </div>
                        <div style="font-size:12.8px">
                          <p><span style="font-family:"Arial
                              Narrow",sans-serif;font-size:10pt">MSD
                              2080</span></p>
                          <p><font face="arial narrow, sans-serif"><i>+356
                                2340 </i></font><i
                              style="font-family:"Arial
                              Narrow",sans-serif;font-size:10pt">3272</i></p>
                        </div>
                        <div style="font-size:12.8px">
                          <p><a href="https://www.um.edu.mt/biobank"
                              target="_blank" moz-do-not-send="true"
                              class="moz-txt-link-freetext">https://www.um.edu.mt/biobank</a><i
                              style="font-family:"Arial
                              Narrow",sans-serif;font-size:10pt"><br>
                            </i></p>
                          <p><br>
                          </p>
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                          <p> <br>
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
Dev mailing list    <a class="moz-txt-link-abbreviated" href="mailto:Dev@ensembl.org">Dev@ensembl.org</a>
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Ensembl Blog: <a class="moz-txt-link-freetext" href="http://www.ensembl.info/">http://www.ensembl.info/</a>
</pre>
    </blockquote>
    <pre class="moz-signature" cols="72">-- 
Dr. Ben Moore (he/him)
Ensembl Outreach Manager

European Bioinformatics Institute (EMBL-EBI)
European Molecular Biology Laboratory
Wellcome Trust Genome Campus
Hinxton
Cambridge
CB10 1SD
UK

<a class="moz-txt-link-abbreviated" href="mailto:bmoore@ebi.ac.uk">bmoore@ebi.ac.uk</a>
+44 (0)1223 494265</pre>
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