Tags: Protein.
Frequency (frq) is a gene discovered in the fungus Neurospora crassa in 1978 that encodes the protein frequency. The gene is 2980bp long in Sordaria macrospora k-hell. The FRQ protein plays a key role in the autoregulatory transcription translation negative feedback loop (TTFL) which is responsible for circadian rhythms in N. crassa and other fungi such as N. sitophita N. tetrasperma N. galapagosensis C. spinulosa and L. australiensis.