
%0 Journal Article
%A O'Shea, JM 
%A Horgan, DJ 
%A JMacfarlane, J 
%T Some Effects of Pressure Treatment on Actomyosin Systems
%J Australian Journal of Biological Sciences
%D 1976/06/01
%V 29
%N 3
%P 197-208
%K 
%R https://doi.org/10.1071/BI9760197
%U https://www.publish.csiro.au/paper/BI9760197 
%X Natural actomyosin, actin and myosin, have been pressurized at up to 150 MN/m2 for 1 h at O°C and examined 3-5 h later. Pressurization of myosin resulted in the formation of aggregates with a molecular weight approximately that expected for a dimer, whereas with F-actin depolymerization occurred. With actomyosin, a gel to sol transition was promoted. Viscosity and light-scattering measurements indicated that pressurization results in a large measure of disaggregation of actomyosin in solution. Pressurization of actomyosin resulted in a greater decrease in the calcium-sensitive, than in the calcium-independent, Mg2+ ATPase activity. The Ca2+ and K+-EDTA ATPase activities of myosin were inhibited to about the same extent. 
