Abstract
The sulfur inclusions from four strain ofBeggiatoa alba were observed by using a ruthenium red-glutaraldehyde technique and a modified Ryter-Kellenberger technique. Three of the four strains contained 4-to 5-nm-thick, single, electron-dense, layered sulfur inclusion envelopes. The fourth strain (B15LD) contained a complex pentalaminar sulfur inclusion envelope, 12–14 nm thick. The sulfur inclusions from all four strains were external to the cytoplasmic membrane but internal to the complexBeggiatoa cell walls. Freeze-etching of theB. alba strain B18LD trichomes revealed the unusual cross-fracture morphology of the sulfur in the inclusions. Fractures around the sulfur inclusions revealed a surface similar to that of the fractured cytoplasmic membrane.
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Strohl, W.R., Geffers, I. & Larkin, J.M. Structure of the sulfur inclusion envelopes from four beggiatoas. Current Microbiology 6, 75–79 (1981). https://doi.org/10.1007/BF01569007
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DOI: https://doi.org/10.1007/BF01569007