Methods of preparing well-orientated sols of f-actin containing filaments suitable for X-ray diffraction.

In this paper we describe methods of preparing orientated f-actin and reconstituting thin filaments that are suitable for X-ray diffraction that allow us to analyse the structure of f-actin to at least 15 A resolution (1 A = 0.1 nm). We described problems that occur during the process of orientation and ways of solving them.