[Domain organization of alpha-actinin from the rabbit skeletal muscle]

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K Sh Kuridze, S Iu Ven'iaminov, M Sh Simonidze

Biokhimiia (Moscow, Russia)

|June 1, 1988

Abstract:

Limited trypsinolysis of native alpha-actinin by trypsin was carried out. This procedure resulted in the formation of two large fragments with Mr of 30 and 70 kD which cover almost the whole subunit of alpha-actinin. Using the sedimentation equilibrium method, it was demonstrated that the bisubunit structure of alpha-actinin is provided for by C-terminal fragments of the subunits. Data from circular dichroism analysis suggest that the fragments formed are independent structural units, i.e., domains.

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