The H-NS protein is one of the major constituents of the nucleoid structure that has been implicated in the DNA packaging and in the global regulation of gene expression. The study of this transcriptional regulator is an effort to fight Xylella fastidiosa, a citrus pathogen responsible for a range of economically important plant diseases, including the citrus variegated chlorosis (CVC). The putative H-NS ORF was cloned into a pET32-Xa/LIC vector in order to overexpress it coupled with fusion tags in Escherichia coli BL21(DE3).
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