Alternate header for print version


Licensing
Public Domain: This image is in the public domain and thus free of any copyright restrictions. However, as is the norm in scientific publishing and as a matter of courtesy, any user should credit the content provider for any public or private use of this image whenever possible. Learn more
tweet  
*CIL – Cell Image Library accession number. Please use this to reference an image.

CIL:14676*  Cite 
Description

The thylakoids of the vegetative cells of the filamentous cyanobacteria, Oscillatoria tenuis, are capable of oxygen-evolving photosynthesis. Freeze-fracture replicas of the vegetative cells revealed the structure of the thylakoids. The process of freeze-fracture splits memebranes along their hydrophobic interior revealing two complementary fracture faces designated P-face and E-face. Each fracture faces has a population of particles which represent intramembrane proteins or protein complexes. Oscillatoria cultures were maintained on agar plates. Cells were collected and suspended in 10 mL dH2O, spun at 2,000 g for 10 min in a clinical centrifuge, resuspended in 5 mL dH2O. Added 5 mL 70% glycerol over 1 hr with continuous stirring, spun at 2,000 g for 10 min in a clinical centrifuge. Pellets were placed on copper support discs, frozen in liquid Freon 12 and stored under liquid nitrogen. Replicas were prepared on a Blazers BA 360 freeze-etch unit and examined in a JEOL TEM 100C at 50,000X magnification.

Biological Sources
NCBI Organism Classification
Oscillatoria tenuis
Cellular Component
outer membrane
thylakoid
Biological Context
Biological Process
photosynthesis
Attribution
Names
Thomas Giddings
Citation
Digital Object Identifier (DOI)
doi:10.7295/W9CIL14676
Archival Resource Key (ARK)
ark:/b7295/w9cil14676
Grouping This image is part of a group.
Imaging
Image Type
transmission electron microscopy (TEM)
Image Mode
transmission electron microscopy (TEM)
Source of Contrast
electron density
Visualization Methods
shadowing and plating
Data Qualifiers
raw, unprocessed data
suitable for spatial measurements
Sample Preparation
Methods
freeze_fracture/freeze_etch
Relation To Intact Cell
whole mounted tissue
Dimensions
Spatial Axis Image Size Pixel Size
X 3437px 0.4nm
Y 4584px 0.4nm