| LPS dependent interaction of Mac 2 binding protein with immobilized CD 14 . ^^^ Binding of both LBP and Mac 2 BP to CD 14 required the simultaneous presence of LPS . ^^^ Experiments with purified Mac 2 BP showed that this protein alone neither enabled responses of CD 14 bearing cells to LPS nor blocked the ability of plasma to enable responses of CD 14 bearing cells to LPS . ^^^ |