单词 | regulon |
释义 | regulonregulon[′reg·yə‚län]regulonreg·u·lon(reg'yū-lon),reg·u·lon(reg'yū-lon)regulon(rĕg′yoo-lŏn)regulona system where more than one structural GENE/OPERON, each with its own PROMOTER, is under control of the same regulator molecule, for example, an activator protein or repressor protein. The genes/operons collectively forming a regulon are often non-contiguous on the genome and share common regulatory sequences, such as activator binding sites (initiators) or operators (see OPERON MODEL), each of which is recognized by the same regulator molecule. A regulon may be positively controlled by an activator protein, as in the maltose regulon of ESCHERICHIA COLI, or negatively controlled by a repressor protein, as in the arginine regulon of E.coli. |
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