Nextdoor is the private social network for your neighborhood. On Nextdoor, neighbors create private groups for their neighborhoods where they can ask questions, get to know one another, and exchange local advice and recommendations.
Up-regulation is a process that occurs within a cell triggered by a signal (originating internal or external to the cell), which results in increased expression of one or more genes and as a result the protein(s) encoded by those genes.
There are five main ways that enzyme activity is controlled in the cell. 1  Enzyme production (transcription and translation of enzyme genes) can be increased or reduced in response to changes in the cell's environment. 2  Enzymes can occur in different cellular compartments. 3  Enzymes can be regulated by their own products.