regulation of DNA-templated transcription regulation of nitrogen utilization cellular response to nutrient nitrogen catabolite regulation of transcription A transcription regulation process in which the presence of one nitrogen source leads to the modulation of the frequency, rate, or extent of transcription of specific genes involved in the metabolism of other nitrogen sources. regulation of transcription by nitrogen catabolites 2010-02-24T02:31:53Z GO:0090293 biological_process tb