<i>A. caulinodans hyq</i> genetic locus and physical map: creation of in-frame, translational fusion deletions.

<p>The main line represents the genetic map of the 7-gene <i>hyq</i> polycistronic operon (7.4 kbp coding DNA). Superimposed above is the ∼300 np sequence upstream of the <i>hyqR</i> start (ATG) codon, presumably comprising the <i>hyq</i> control region, which includes a canonical NIFAbox element, facilitating binding of the NIFA transcriptional activator, adjacent to a σ54F-box element, allowing initiation by RNA polymerase·σ54F complex (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0004695#s2" target="_blank">Results</a>). For additional details, please refer to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0004695#pone-0004695-g001" target="_blank">Fig 1</a>.