<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE article  PUBLIC "-//NLM//DTD Journal Publishing DTD v3.0 20080202//EN" "http://dtd.nlm.nih.gov/publishing/3.0/journalpublishing3.dtd"><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" dtd-version="3.0" xml:lang="en" article-type="research article"><front><journal-meta><journal-id journal-id-type="publisher-id">AJMB</journal-id><journal-title-group><journal-title>American Journal of Molecular Biology</journal-title></journal-title-group><issn pub-type="epub">2161-6620</issn><publisher><publisher-name>Scientific Research Publishing</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.4236/ajmb.2012.23025</article-id><article-id pub-id-type="publisher-id">AJMB-20969</article-id><article-categories><subj-group subj-group-type="heading"><subject>Articles</subject></subj-group><subj-group subj-group-type="Discipline-v2"><subject>Biomedical&amp;Life Sciences</subject></subj-group></article-categories><title-group><article-title>
 
 
  The restriction endonuclease Tru9I is a useful tool to analyze telomere sequences separately from interstitial telomeric sequences in &lt;i&gt;Arabidopsis thaliana&lt;/i&gt;
 
</article-title></title-group><contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>aría</surname><given-names>I. Vaquero-Sedas</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref></contrib><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Miguel</surname><given-names>A. Vega-Palas</given-names></name><xref ref-type="aff" rid="aff1"><sup>1</sup></xref><xref ref-type="corresp" rid="cor1"><sup>*</sup></xref></contrib></contrib-group><aff id="aff1"><addr-line>Instituto de Bioquímica Vegetal y Fotosíntesis, CSIC-Universidad de Sevilla, Seville, Spain</addr-line></aff><author-notes><corresp id="cor1">* E-mail:<email>vega-palas@ibvf.csic.es(MAV)</email>;</corresp></author-notes><pub-date pub-type="epub"><day>27</day><month>07</month><year>2012</year></pub-date><volume>02</volume><issue>03</issue><fpage>242</fpage><lpage>244</lpage><history><date date-type="received"><day>19</day>	<month>April</month>	<year>2012</year></date><date date-type="rev-recd"><day>3</day>	<month>May</month>	<year>2012</year>	</date><date date-type="accepted"><day>24</day>	<month>May</month>	<year>2012</year></date></history><permissions><copyright-statement>&#169; Copyright  2014 by authors and Scientific Research Publishing Inc. </copyright-statement><copyright-year>2014</copyright-year><license><license-p>This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/</license-p></license></permissions><abstract><p>
 
 
  We have previously described a simple method to analyze the chromatin structure of Arabidopsis telomeres independently of that of Interstitial Telomeric Sequences (ITSs). By using this method, we found that, whereas ITSs are heterochromatic, Arabidopsis telomeres exhibit euchromatic features [1]. Some concerns have been recently raised about the accuracy of this procedure [2]. Here, we summarize these concerns and justify our experimental approaches and interpretation of results.
 
</p></abstract><kwd-group><kwd>&lt;i&gt;Arabidopsis thaliana&lt;/i&gt;; telomeres; ITSs; euchromatin; heterochromatin</kwd></kwd-group></article-meta></front><body><sec id="s1"><title>ACKNOWLEDGEMENTS</title><p>This research was supported by the Spanish Ministry of Science and Innovation grant BIO2011-24794 and by FEDER funds.</p></sec><sec id="s2"><title>REFERENCES</title></sec></body><back><ref-list><title>References</title><ref id="scirp.20969-ref1"><label>1</label><mixed-citation publication-type="other" xlink:type="simple">Vaquero-Sedas, M., Gámez-Arjona, F. and Vega-Palas, M. (2010) Arabidopsis telomeres exhibit euchromatic features. Nucleic Acids Research.  
doi:10.1093/nar/gkq1119</mixed-citation></ref><ref id="scirp.20969-ref2"><label>2</label><mixed-citation publication-type="other" xlink:type="simple">Majerová, E., Fojtová, M., Mandáková, T. and Fajkus, J. (2011) Methylation of plant telomeric DNA: what do the results say? Plant Molecular Biology, 77, 533-536.  
doi:10.1007/s11103-011-9834-5</mixed-citation></ref><ref id="scirp.20969-ref3"><label>3</label><mixed-citation publication-type="other" xlink:type="simple">Vaquero-Sedas, M. and Vega-Palas, M. (2011) On the chromatin structure of eukaryotic telomeres. Epigenetics, 6, 1055-8. doi:10.4161/epi.6.9.16845</mixed-citation></ref><ref id="scirp.20969-ref4"><label>4</label><mixed-citation publication-type="other" xlink:type="simple">Gámez-Arjona, F., López-López, C., Vaquero-Sedas, M. and Vega-Palas, M. (2010) On the organization of the nucleosomes associated with telomeric sequences. Biochimica et Biophysica Acta, 1803, 1058-61.  
doi:10.1016/j.bbamcr.2010.03.021 </mixed-citation></ref><ref id="scirp.20969-ref5"><label>5</label><mixed-citation publication-type="other" xlink:type="simple">Regad, F., Lebas, M. and Lescure, B. (1994) ITSs within the Arabidopsis thaliana genome. Journal of Molecular Biology, 239, 163-9. doi:10.1006/jmbi.1994.1360</mixed-citation></ref><ref id="scirp.20969-ref6"><label>6</label><mixed-citation publication-type="other" xlink:type="simple">Uchida, W., Matsunaga, S., Sugiyama, R. and Kawano, S. (2002) Interstitial telomere-like repeats in the Arabidopsis thaliana genome. Genes Genetic Systems, 77, 63-7.  
doi:10.1266/ggs.77.63</mixed-citation></ref><ref id="scirp.20969-ref7"><label>7</label><mixed-citation publication-type="other" xlink:type="simple">Vannier, J., Depeiges, A., White, C. and Gallego, M. (2009) ERCC1/XPF protects short telomeres from homologous recombination in Arabidopsis thaliana. PLoS Genetics, 5, e1000380.  
doi:10.1371/journal.pgen.1000380 </mixed-citation></ref><ref id="scirp.20969-ref8"><label>8</label><mixed-citation publication-type="other" xlink:type="simple">Pisano, S., Galati, A. and Cacchione, S. (2008) Telomeric nucleosomes: Forgotten players at chromosome ends. Cell Molecular Life Science. doi:10.1007</mixed-citation></ref><ref id="scirp.20969-ref9"><label>9</label><mixed-citation publication-type="other" xlink:type="simple">Lippman, Z., Gendrel, A., Colot, V. and Martienssen, R. (2005) Profiling DNA methylation patterns using genomic tiling microarrays. Nat Methods, 2, 219-24.  
doi:10.1038/nmeth0305-219</mixed-citation></ref></ref-list></back></article>