The level of receptors expressed on the cell surface determines the cellular responsiveness to agonists. Proteinase-activated receptors (PARs) have been reported to be either upregulated or down-regulated in response to various types of stimulation and pathological situations. In addition. the transcriptional regulation plays a major role in the alteration of the expression of PARs un... https://www.bekindtopets.com/top-price-Disney-Bambi-Thumper-Character-Pattern-Galaxy-S23-Clear-Case-p110724-huge-savings/