Abstract
There are several different blood comp nents; red blood cell, granulocyte, lymphocyte, platelet and plasma etc. It is considered that there are several alloantigens on the red blood cell, granulocyte, lymphocyte, platelet and plasma in man. Therefore, the between HLA antigen and blood comp nents must be tested and investigated. The relation relation between HLA antibody production and HLA incompatibility n father and mother, the split of HLA antigens and soluble HLA antigens in the serum have been pres nted and discussed.
