Metabolic Properties of Some L Forms Derived From Gram-Positive and Gram-Negative Bacteria

Weibull, Claes; Gyllang, Hans

doi:10.1128/jb.89.6.1443-1447.1965

Cited by 11 publications

(2 citation statements)

References 16 publications

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“…In 1966, Ferrandes et al (72) reported that cytochromes were concentrated in the mesosomal fraction of B. subtilis. As pointed out by Ryter (249), this observation was supported by circumstantial evidence such as the absence of cytochromes in membranes of Lforms of gram-positive bacteria which do not have mesosomes (327). However, as the methods for fractionation of mesosomal membranes improved, the original observation of Ferrandes et al (72) could not be reproduced.…”

Section: Chemical Composition Of Isolatedmentioning

confidence: 95%

Mesosomes: membranous bacterial organelles.

Greenawalt¹,

Whiteside²

1975

Bacteriological Reviews

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And is it not true that the comparatively simple act of looking through a microscope presents the eye with pictures that we should all declare fantastic and far-fetched if we happened upon them by chance. .. (Schmidt, 270) Meditation over an electron micrograph of a bacterial cell wall or the endoplasmic reticulum ofa liver cell brings conviction that the position ofsynthesis within the cell must be as important as the chemical synthesis itself. (Gale, 89

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Section: Chemical Composition Of Isolatedmentioning

confidence: 95%

Mesosomes: membranous bacterial organelles.

Greenawalt¹,

Whiteside²

1975

Bacteriological Reviews

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“…Thus, the Staphylococcus and Corynebacterium L forms require a medium of rather high osmotic pressure for growth, a requirement not exhibited by the Proteus L forms (Dienes and Sharp, 1956). The first two organisms contain little or no catalase and cytochromes, enzymes found in large amounts in the last (Weibull and Gyllang, 1965). One Proteus L form, strain L 9, contains considerable amounts of a typical cell-wall component, diaminopimelic acid (DAP) (W1eibull, 1958); the others, only trace amounts (AMorrison and Weibull, 1962).…”

Section: Fig 4 Section Of Amentioning

confidence: 99%

Structure of Bacterial L Forms and Their Parent Bacteria

Weibull

1965

J Bacteriol

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Light and electron microscopic studies were done on normal cells and L forms of Proteus mirabilis, Staphylococcus aureus, and Corynebacterium sp. grown in liquid media. Under the prevailing growth conditions, the L forms studied were morphologically indistinguishable from one another. They appeared as approximately spherical elements occurring singly or more often connected with each other by thinner portions of cell material. In sections of large L forms, the following structures were seen: a peripheral, triple-layered ("unit") membrane, a granular cytoplasm, nuclear regions, and vacuoles limited by membranes. Small bodies often were present inside the vacuoles. These bodies also contained a peripheral membrane and a granular cytoplasm but usually no nuclear regions. The normal bacteria from which the L forms were derived differed markedly in structure from one another, especially in the surface layers of the cells. Studies on the structure of bacteria have been greatly facilitated during the past 10 years thanks to increased resolution of the available electron microscopes and to advances in electron-microscopical techniques, e.g., the fixation and embedding methods developed by Kellenberger, Ryter, and Sechaud (1958). However, relatively few detailed reports on the structure of bacterial L forms have appeared so far (

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Some physiological characters of L forms of Staphylococcus aureus

Smith

Willis

1967

J. Pathol.

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Cell membranes of Mycoplasma were isolated either by osmotic lysis or by ultrasonic disruption of the organisms. The membranes were dissolved in phenol-acetic acid-water (2:1:0.5, w/v/v), and membrane proteins were separated electrophoretically in polyacrylamide gels containing 5 m urea and 35% (v/v) acetic acid. The electrophoretic patterns of membrane proteins were highly specific for the different Mycoplasma strains examined. The use of this method to prove the identity or dissimilarity of Mycoplasma strains is suggested.

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Metabolic Properties of Some L Forms Derived From Gram-Positive and Gram-Negative Bacteria

Cited by 11 publications

References 16 publications

Mesosomes: membranous bacterial organelles.

Mesosomes: membranous bacterial organelles.

Structure of Bacterial L Forms and Their Parent Bacteria

Some physiological characters of L forms of Staphylococcus aureus

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