What Do Barn Owls Eat | Barn Owl Facts For Kids. Whether they are living in natural environment or artificial roosting places (such as ruined buildings) barn owls will hunt terrestrial mammals including rodents. Barn owls are known to fly just above the open ground hovering over spots that cover potential prey.
Regulation of gene expression includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products (protein or RNA), and is informally termed gene regulation. Repressors bind to the Operator, coding sequences on the DNA strand that are close to or overlapping the promoter region, impeding RNA polymerase's progress along the strand, thus impeding the expression of the gene.The image to the right demonstrates regulation by a repressor in the lac operon.
Regulator gene. From Wikipedia, the free encyclopedia. A regulator gene, regulator, or regulatory gene is a gene involved in controlling the expression of one or more other genes. A regulator gene may encode a protein, or it may work at the level of RNA, as in the case of genes encoding microRNAs. In prokaryotes, regulator genes often code for repressor proteins. Repressor proteins bind to operators or promoters, preventing RNA polymerase from transcribing RNA.