Thiocapsa floridana; a cytological, physical and chemical characterization. I. Cytology of whole cells and isolated chromatophore membranes

Bela J. Takacs, Stanley C. Holt

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

The ultrastructure of the purple sulfur photosynthetic bacterium Thiocapsa floridana was examined by chemical fixation and freeze-etching. In addition, we describe two isolation and purification procedures for the chromatophore membranes of T. floridana. During freeze-etching membranes are split along a weak interior zone, resulting in two asymmetric membrane faces. Freeze-etch studies of both whole cells and of isolated membranes, in conjunction with the solubilization and reconstituting of isolated chromatophores, support a subunit membrane model in which protein complexes extend through the entire membrane.

Original languageEnglish (US)
Pages (from-to)258-277
Number of pages20
JournalBBA - Biomembranes
Volume233
Issue number2
DOIs
StatePublished - Apr 13 1971
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Cell Biology

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