Which of the Following Is Incorrect Regarding Sphingosine 1-Phosphate (S1P)and

question 20

Multiple Choice

Which of the following is incorrect regarding sphingosine 1-phosphate (S1P) and its receptor?

• A)It is a lipid that has chemotactic activity.
• B)S1P gradients are established in lymph nodes with lowest concentrations in T-cell areas.
• C)CD69 upregulates S1P receptor expression on the surface of naive T cells.
• D)S1P is synthesized by all cells.

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