The transporter Spns2 is required for secretion of lymph but not plasma sphingosine-1-phosphate.
Mendoza A, Br?art B, Ramos-Perez WD, Pitt LA, Gobert M, Sunkara M, Lafaille JJ, Morris AJ, Schwab SR. The transporter Spns2 is required for secretion of lymph but not plasma sphingosine-1-phosphate. Cell Rep. 2012 Nov 29; 2(5):1104-10.