passages.id: split_8_test_1492_passage
passages.type: progene_text
passages.text: Experiments using [14C]arachidonate - labeled lymphocytes coincubated with unlabeled HUVEC , and [14C]arachidonate - labeled HUVEC coincubated with unlabeled lymphocytes showed that the arachidonic acid used for PGI2 synthesis was totally of endothelial origin .