PURIFICATION OF LEUKOCYTE GROUP SUBSTANCES FROM HUMAN PLACENTAL TISSUE

Abstract
In an attempt to obtain more information about human transplantation antigens, substances derived from placental tissue were identified with the use of leukocyte agglutinin inhibition as a test system. The concentration and purification of the active fractions are described. On the basis of its stability to chemical procedures a lipoprotein structure for the active principle seems most likely.