in an investigation of the antigenic fine structure of phages t4 and ddvi with the use of the neutralization reaction and electron-microscopic observation of the phage-antibody complexes , it has been possible to establish that the head of phage t4 consists of proteins which have antigenic determinants of two types : the first type is identical to the antigens of the head of phage ddvi , and the second type is apparently absent in phage ddvi .
C0003316
antigenic determinants
C0003320
antigens