Contrary to a previous report, messenger RNA for the tryptophan operon is degraded in the 5′—3′ direction. The following two articles describe how pulse labelling and hybridization experiments ...

Last week I finally addressed promoters and gave a bit of background on the lac operon. Looking back, I feel that I didn't give the topic of operons adequate treatment. They are a very crucial aspect ...

Tryptophan is an essential amino acid used to make proteins. Your body does not make it, so you need to get it from your diet. Foods that contain tryptophan include animal products like chicken and ...