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. 1965 Jul;90(1):193–204. doi: 10.1128/jb.90.1.193-204.1965

Ultrastructure and Ribosomes of Mycoplasma gallisepticum

Jack Maniloff a,1, Harold J Morowitz a, Russell J Barrnett a
PMCID: PMC315613  PMID: 16562017

Abstract

Maniloff, Jack (Yale University, New Haven, Conn.), Harold J. Morowitz, and Russell J. Barrnett. Ultrastructure and ribosomes of Mycoplasma gallisepticum. J. Bacteriol. 90:193–204. 1965.—The ultrastructure of Mycoplasma gallisepticum strain A5969 has been studied by electron microscopy (thin-section and negative staining), ultracentrifugation, and chemical analysis. The list of ultrastructure is: membrane, nuclear material, ribosomes, ribosomal structures, infra-bleb region, and blebs. The nuclear material, containing the cell's deoxyribonucleic acid, appears as an unbounded region containing 30-A fibrils. The ribosomes have a diameter of about 140 A, a ribonucleic acid-protein ratio of 0.68, and an uncorrected sedimentation coefficient of 70.2S. The 70.2S particle can be broken into 49.3S and 32.4S particles. Ribosomal arrays were found filling the intracytoplasmic space between the nuclear material and the membrane. Under certain conditions, these arrays formed cylindrical arrangements of ribosomes. The infra-bleb region is composed of a granular material, although little internal structure could be found. The bleb was highly structured.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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