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height:75.51%'><span style='font-family:Verdana;font-size:64%'>Evaluating </span><span
style='font-family:Verdana;font-size:64%'><i>Ctbp2</i></span><span
style='font-family:Verdana;font-size:64%'> using other resources</span><span
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<td align=left colspan=1><font face=Verdana size=3>Ctbp2 should also be
considered a high priority biological candidate gene responsible for
modulating App expression levels. The C-terminal binding protein 2 is a
transcriptional co-repressor also known as Ribeye.</font><font
face=Times-Roman size=3> The gene produces two transcripts encoding distinct
proteins. The short form is a transcriptional repressor that binds a
Pro-X-Asp-Leu-Ser peptide motif and interacts with several transcription
factors including EVI1, ZFPM1, and ZFHX1A (aka TCF8, deltaEF1). The longer
isoform is a major component of specialized synapses in photoreceptors. Both
proteins contain a NAD+ binding domain similar to NAD+-dependent
2-hydroxyacid dehydrogenases.</font><br>
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<td align=left colspan=1><font face=Verdana size=3>Notes:</font><br>
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<td align=left colspan=1><font face=Verdana size=3>1. To find out more about
CTBP2 protein and the Ctbp2 gene, link to iHOP at
http://www.pdg.cnb.uam.es/UniPub/iHOP/ and type in CTBP2</font><br>
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<td align=left colspan=1><font face=Verdana size=3>Try Arrowsmith at
http://arrowsmith.psych.uic.edu/cgi-test/arrowsmith_uic/pubsmith.cgi</font><br>
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<td align=left colspan=1><font face=Verdana size=3>2. Both APP and CTBP2 are
involved in oxidoreducatase activity or Notch signaling. To establish this
common gene ontology visit NCBI<span style="mso-spacerun: yes">
</span>http://www.ncbi.nih.gov/entrez/query.fcgi?db=gene and enter each gene
symbol.</font><br>
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<td align=left colspan=1><font face=Verdana size=3>3. You can get interesting
hints regarding Ctbp2 expression partners by examining the genetic
correlations between Ctbp2 probe set 1422887_a_at and all other transcripts
on the M430 Affymetrix array. Use the Striatum data set because we already
know from previous work (the previous slide) that this gene is a cis
QTL.<span style="mso-spacerun: yes"> </span>You should be able to show
that Ctbp2 and Notch3 have antagonistic expression patterns in striatum. The
negative genetic correlation with E2f4 is even stronger. The transcript also
has a high positive genetic correlation with Rdh14. Of particular interest
with respect to APP protein processing, Ctbp2 covaries positively with Bace2
(the transcript of the beta site APP-cleaving enzyme 2).</font><br>
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