Sphingosine 1-phosphate (S1P) is an extensively studied signaling molecule that contributes to cell proliferation. survival. migration and other functions through binding to specific S1P receptors. The cycle of S1P1 internalization upon S1P binding and recycling to the cell surface when local S1P concentrations are low drives T cell trafficking. https://www.roneverhart.com/C7-Corvette-Stingray-Lapel-Pin-Crossed-Flags/