Particles of phage No. 1 are morphologically and antigenically identical with the large particles of phage No. 1M and are antigenically different from the large particles of phage H17.
Les particules du phage No. 1 sont morphologiquement et antigéniquement identiques aux grandes particules du phage No. 1M et diffèrent antigéniquement des grandes particules du phage H17.