Assertion: regulation | /r/CapableOf | occur for example
Facets:
Source sentences:
text: Up-regulation occurs, for example, when a cell is deficient in some kind of receptor.
text: Down-regulation occurs, for example, when a cell is overstimulated by a neurotransmitter, hormone, or drug for a prolonged period of time, and the expression of the receptor protein is decreased in order to protect the cell (see also tachyphylaxis).