> as lemmas

1944 Proc. National Acad. Sci. U.S.A. 30 398 The viruses used were the strains α and γ described by Delbrück and Luria and a new strain..which has been determined to be identical with strain T7 of Demerec and Fano [reference given to paper ‘in press’, quoted next.]

1945 Demerec & Fano in Genetics 30 119 The materials used in our experiments consisted of the same bacterial strain—E. coli B—previously used by Luria and Delbrück.., of seven phage strains active on B, and of various strains of bacteria..resistant to one or more of the phages. The phage strains were indicated as type 1 to type 7 (T1 to T7).

1960 New Biol. 31 78 One group of the larger phages..has become the best understood of any kind of virus. These are the closely related T2, T4 and T6, known collectively as the T-even phages.

1968 H. Harris Nucleus & Cytoplasm iii. 46 It was known at the time that this work was undertaken that when E. coli cells were infected with the T-even bacteriophages net synthesis of bacterial RNA was rapidly inhibited.

1973 R. G. Krueger et al. Introd. Microbiol. xiv. 410/2 Studies of T4 mutants have gone a long way towards elucidating the steps by which biological structures, such as the head and tail of the virus, are assembled.