Cryo-electron microscopy of vitreous sections.
Since the beginning of the 1980s, cryo-electron microscopy of a thin film of vitrified aqueous suspension has made it possible to observe biological particles in their native state, in the absence of the usual artefacts of dehydration and staining. Combined with 3-d reconstruction, it has become an important tool for structural molecular biology. Larger objects such as cells and tissues cannot generally be squeezed in a thin enough film. Cryo-electron microscopy of vitreous sections (CEMOVIS) provides then a solution. It requires vitrification of a sizable piece of biological material and cutting it into ultrathin sections, which are observed in the vitrified state. Each of these operations raises serious difficulties that have now been overcome. In general, the native state seen with CEMOVIS is very different from what has been seen before and it is seen in more detail. CEMOVIS will give its full potential when combined with computerized electron tomography for 3-d reconstruction.
Laboratoire d'Analyse Ultrastructurale, Bâtiment de Biologie, Université de Lausanne, Lausanne, Switzerland.
Ashraf
A
Al-Amoudi
Jiin-Ju
JJ
Chang
Amélie
A
Leforestier
Alasdair
A
McDowall
Laurée Michel
LM
Salamin
Lars P O
LP
Norlén
Karsten
K
Richter
Nathalie Sartori
NS
Blanc
Daniel
D
Studer
Jacques
J
Dubochet
D000818:Animals; D020285:Cryoelectron Microscopy; D000458:Cyanobacteria / Q000648:ultrastructure; D004247:DNA / Q000648:ultrastructure; D003896:Desmosomes / Q000648:ultrastructure; D004926:Escherichia coli / Q000648:ultrastructure; D006801:Humans; D011550:Pseudomonas aeruginosa / Q000648:ultrastructure; D012867:Skin / Q000648:ultrastructure
D004247:DNA