| pubmed-article:7378398 | pubmed:abstractText | In cardiac natural actomyosin prepared from hyperthyroid rabbits, the time of onset of the superprecipitation response was shortened by 58% and the rate of response was increased 4-fold compared with euthyroid animals. However, Ca2+-sensitivity of cardiac natural actomyosin prepared from either euthyroid or hyperthyroid rabbits was not changed over the range of 10(-7) to 6.6 . 10(-5) M free Ca2+ concentrations. Skeletal natural actomyosin prepared from either euthyroid or hyperthyroid rabbits showed a far higher Ca2+-sensitivity than cardiac natural actomyosin, but there was no difference in either time of onset or rate of superprecipitation response. | lld:pubmed |
