Fig 2 \ T2 pliage i-articli' Rcntly disniptrd by shear. Many equivalent i.ietures 

 show the presence of a bulge, which is variable in size and generally about 5000 A 

 from the broken phage coat. The marker indicates a length of 1 /t. (From Ruben- 

 stein, 1960.) 



116 



