582 



BACTERIOPHAGES 



Kinetic studies {continued) 



of pH stability of coliphages, 50 

 of protein synthesis in bacterio- 

 phages, 252, 253, 263 

 Klebsiella phage, enzymatic activity, 



18 

 Klebsiella pneumoniae, enzyme in phage 

 lysates of, 168 



Lactobacillus S'^Gcits, 121 

 Latent period, definition and deter- 

 mination, 14, 15, 169, 440, 473 

 effect on DNA transfer from parent 



to progeny phage, 220, 221 

 extension, 20, 170 



by ultraviolet light, 68, 69, 170 

 as taxonomic criterion for bac- 

 teriophages, 424, 426, 427 

 variation, 170 

 Leucine, in coliphages, 90 



effect on bacteriophage reproduc- 

 tion, 274 

 as growth factor for coliphage 

 lambda, 243 

 Light, see also Ultraviolet light 



effect on bacteriophages, 46, 63-65, 

 71-73, 312 

 Limited participation, in mixedly 

 infected bacteria, 329, 330 

 Linoleic acid, effect on influenza 



virus, 51 

 Linolenic acid, effect on 

 influenza virus, 51 

 Lipase, in coliphage WLL, 238 

 Lipid, in coliphages, 88 

 Lithium ion, effect on adsorption 



of bacteriophage, 141 

 Lysine, in coliphages, 90 



labeled, in study of fate of infecting 

 bacteriophages, 211 

 in study of protein synthesis in 

 bacteriophages, 250 



Lysis, 20-25, 190, 191 

 definition, 440 



inhibition, 20, 24, 76, 170, 171, 257 

 mutations affecting, 302-304, 



316, 506, 507 

 as taxonomic criterion for 

 bacteriophages, 429 

 in lysogenic bacteria, 9, 10, 11,21 

 methods for observing, 481, 482 

 premature, 19, 20, 76, 165, 172- 

 75, 191, 273, 274 

 in assay of bacteriophage, 32, 33, 



519-22 

 definition, 440 



resistance to, 166, 167, 328, 329 

 Lysis time, in assay of bacteriophage, 



31,32 

 Lysis from without, see Lysis, pre- 

 mature 

 Lysogenesis, see Lysogeny 

 Lysogenic bacteria, 124, 128, 129, 

 366-80 

 bacteriophage production by, 371- 



74 

 criteria, 366 

 defective, 375, 376 

 definition, 11, 440 

 epoxides and ethyleneimines 



effect on, 373 

 infection effect on, 201, 376-79 

 nitrogen mustard effect on, 9, 312, 



314, 373 

 organic peroxides effect on, 373 

 resistance to infection, 300, 374, 375 

 ultraviolet light effect on, 9, 246, 



312-16, 318, 324, 373 

 X-rays effect on, 9, 373 

 Lysogenization, conditions affecting, 

 370, 371 

 definition, 366, 367, 441 

 effect on bacterial host, 378, 379 

 effect on host specificity of 

 bacteriophages, 128, 129 



