Chromatin structure of rRNA genes in the salivary gland of <i>Trichomegalosphys pubescens</i>.

<p>(A) rDNA map of <i>T. pubescens</i> showing (red bar) the position of the 26 S rDNA probe <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0044006#pone.0044006-Madalena2" target="_blank">[14]</a> used for hybridizations. Positions of <i>Eco</i>RI (<i>E</i>), <i>Hind</i>III (<i>H</i>) and <i>Bgl</i>I (<i>B</i>) restriction sites are indicated. (B) Southern-blot hybridization analysis of rDNA fragments obtained by <i>Hind</i>III digestions of genomic DNA from salivary gland chromatin photo-reacted in the presence of psoralen (ps) and from control, untreated DNA (c).