Many times (at least several times a week) I would feel a lot of air in my stomach - mostly after eating or drinking soda or whatever. It was okay for a while, but I didn't think it was normal for me to produce that much gas in my stomach and for me to be unable to burp.
In molecular genetics, a repressor is a DNA-or RNA-binding protein that inhibits the expression of one or more genes by binding to the operator or associated silencers.
Repressors (def). Repressors are regulatory proteins that block transcription of mRNA. They do this by binding to a portion of DNA called the operator (operators are often called boxes now) that lies downstream of a promoter (def).