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. 2009 Jun 11;284(34):22926–22937. doi: 10.1074/jbc.M109.019232

TABLE 1.

In vitro motility data using HMM and showing the effect of myosin isoform composition and temperature on the amrinone-induced reduction in sliding velocity

HMM preparation % reduction of sliding velocity at two temperaturesa
28.6 °C 22.9 °C
% %
Fast leg muscleb 28.9 31.3
Musculus psoas majorc, prepared April, 2007 20.7 13.3
M. psoas majorc, prepared October, 07 17.3 11.5

a Each numerical value was based on more than 147 filament paths in both test and control.

b Similar amounts of MHC IIx and MHC IIb according to Ref. 24 and confirmed in the present work (data not shown).

c This muscle contains almost exclusively MHC IIx (43).