Bacterial Membranes and the Respiratory Chain by N. S. Gel’man, M. A. Lukoyanova, D. N. Ostrovskii (auth.)

By N. S. Gel’man, M. A. Lukoyanova, D. N. Ostrovskii (auth.)

The most beneficial provider Dr. Gel'man and her colleagues have played for the various investigators of bacterial membrane platforms in generating their first very good monograph on "The respiration equipment of micro organism" in 1966 has been persevered and increased within the practise of this quantity. The au­ thors have introduced jointly in one quantity a lot of the aspect of investiga­ tions of bacterial membranes on the ultrastructura11eve1 and the chemical and biochemical organizationa11eve1s. The technique in bringing jointly this rap­ idly expanding quantity of discovery has been either complete and process­ atic, with a continuing knowledge of the significance of the molecular and func­ tional houses and relationships latest in a number of bacterial membranes. The monograph obviously displays the authors' curiosity and their very own inti­ mate involvement within the elucidation on the molecular point of the breathing chains geared up within the prokaryotic bacterial membrane method. it truly is totally acceptable that the bankruptcy dedicated to this subject should still occupy a considerable share of this monograph. certainly, had this quantity been ready at this very second, that share might were even larger, because the paintings in .

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Some bacteria (M. , 1970). Kates (1964) points out that there is more phosphatidylethanolamine than phosphatidylglycerol in the Gram-negative bacteria, while the opposite is true of the Gram-positive bacteria. However, there are exceptions. , 1965). Kates (1964) suggests that the high content of phosphatidylethanolamine in the Gram-negative bacteria is associated with the cell wall membrane. , 1969). Another example of differences in the phospholipid composition of bacteria is given by the distribution oflipoamino acids (O-esters of amino acids and phosphatidylglycerol).

G. a "l: E'~ go,? ,,," ;," Note. L. casei, M. Iysodeikticus, B. megaterium (Thorne and Kodicek, 1962); B. licheniformis, B. stearothermophilus, S. lutea, A. aerogenes, E. , S. gallinarum (Cho and Salton, 1964, 1966);S. , 1966); M. , 1966, data for phospholipids); C. thiosulphatophilum (Schmitz, 1967); H. parainjluenzae (White and Cox, 1967, data for phosphatidylethanolamine); B. , 1967a). , i TABLE 3. s:: t"f:I == ~ t"f:I 38 CHAPTER II Glycolipids of the membranes have not yet been adequately studied.

These formations are replaced 36 h later, before sporulation, by typical mesosomes (Remsen, 1968). , 1970). The existence of mesosomes in young B. subtilis cells seems doubtful in light of the discovery by Nanninga (1971) of mesosomes in these cells by the freeze-etching method only if the cells are prefixed by the Ryter-Kellenberger method. No final conclusions regarding the mechanism of membrane biogenesis can be drawn from the facts described above. The most likely solution to the problem is to postulate that membrane synthesis takes place irregularly, perhaps in loci whose rate of formation is determined by the synthesis of individual components and, perhaps, by other physiological conditions.

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