Freeze-fracture autoradiography: feasibility.

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Abstract
We have shown that the combination of freeze-fracture with electron microscope autoradiography can be developed into a technique for correlating the molecular structure of the biological membrane with its chemical and functional characteristics. Within the limits of electron microscope autoradiographic resolution, FARG has the potential to detect the relative distribution of molecules in each half of the membrane and within the plane of the membrane. The use of radioisotopic labels in combination with freezing techniques requires minimal perturbation of the system being studied and may be suitable for the examination of substances which would be extracted or would diffuse during the normal fixation and embedding procedures used in standard electron microscope autoradiography.

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