2. bow down-bend one's knee or body, or lower one's head; He bowed before the King; She bowed her head in shame. bow. conge, congee-perform a ceremonious bow. gesticulate, gesture, motion-show, express or direct through movement; He gestured his desire to leave.
Sections. Definition. Gene regulation refers to the mechanisms that act to induce or repress the expression of a gene. These include structural and chemical changes to the genetic material, binding of proteins to specific DNA elements to regulate transcription, or mechanisms that modulate translation of mRNA. News and Comment.
gene. A segment of DNA, occupying a specific place on a chromosome, that is the basic unit of heredity. Genes act by directing the synthesis of proteins, which are the main components of cells and are the catalysts of all cellular processes.ach gene is a specific segment of DNA, occupying a fixed place on a chromosome. Genes contain the chemical information needed to create different kinds of proteins. These proteins are used to repair cells and make new ones.