By A. H. & Morris, J. Garreth [eds.] Rose

This quantity in a research-level sequence covers assorted features of microbial body structure and biochemistry together with inositol metabolisms in yeasts, bacterial adhesion, natural acids, the bacterial flagellum and the mechanical behaviour of bacterial phone partitions. it really is meant to be of use to microbiologists, biochemists and biotechnologists. different similar works during this sequence are volumes 29, 30 and 31.

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In “Spores IV” (L. L. ), pp. 59-71. American Society for Microbiology, Washington. Ohye, D. F. and Murrell, W. G. JournalofBacteriology 115, 1179. Orndorff, G. R. and MacKenzie, A. P. (1973). Cryobiology 10, 475. Ortiz, J . M. JournalofBacteriology 117, 909. -T. and Marquis, R. E. Journal $Bacteriology 101, 92. Pearce, S. M. and Fitz-James, P. C. Journal ofBacteriology 107, 337. Pelcher, E. A,, Fleming, H . P. and Ordal, 2. J . (1963). Canadian Journal ofMicrobiology 9, 251. Pfennig, N. Archivesfiir Mikrobiologie 26, 345.

The spore lytic enzymes have not been separated and the particular properties and function of each enzyme determined. All studies using spore lytic enzyme have used this mixture of enzymes, and the relative participation of each will depend upon the conditions of pH value, cation concentration and substrate used. Great caution is therefore necessary in comparing work from different laboratories or involving quantitative measurements of activity. MOLECULAR STRUCTURE OF THE BACTERIAL SPORE 23 Two major hnctions for the spore lytic enzymes can be envisaged, namely lysis of the cortex and decrease in the rigidity of the germ cell wall to facilitate swelling of the young cell.

Glutamate is particularly effective and Salmonellae dried in glutamate can survive many hours at 100°C (Annear, 1964). Protective compounds require at least three polar groups and high solubility. High solubility would not be an advantage in vivo as the small size of the cell and the presence of proteins would inhibit crystallization, and a high osmotic activity would make concentration of the core contents more difficult. All the major spore electrolytes, dipicolinic acid, glutamic acid, phosphoglyceric acid, sulpholactic acid and arginine appear suitable for this function and the divalent cations have clear advantages in the formation o f a matrix of low osmotic activity.

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