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Edg4 is a Lysophospholipid/Lysosphingolipid Receptor activated by phosphatidic acid (PA) and lysophosphatidic acid (LPA). It enhances the transcription of serum response element (SRE) reporter genes. In CD4(+) T cells, Edg4 may be involved in the control of interleukin-2 secretion. Edg4 expression has been documented in leukocytes, pancreas, spleen, thymus, prostate, and testis. Edg4 expression has also been seen in many cancer cell lines, including those of brain, blood, breast, ovary, cervix, colon, skin, and thyroid. ESTs have been isolated from B-cell/lung/testis, blood, brain, embryo, heart/melanocyte/uterus, liver, placenta, prostate, and skin libraries.
