When it unbinds, the resulting shape-change puts the tropomyosin bodyguards back into place.

当它绑时，由此产生的形状变化使原肌球蛋白保镖恢复原位。

Now shrimp shellfish and dust mites are all invertebrates and all of them trigger allergies thanks to a protein called tropomyosin.

壳类动和尘螨都是无脊椎动，它们之所以触发过敏反应是因为一种叫做原肌球蛋白的。

Namely, actin is blocked by a couple of protein bodyguards — called tropomyosin and troponin — which keep getting in the way.

也就是说，肌动蛋白被蛋白的保镖阻断——原肌球蛋白和肌钙蛋白——它们一直碍事。

Immediately after a muscle fiber is stimulated by a nerve — when calcium ions are flooding into the sarcomeres to pull away those two protein bodyguards of tropomyosin and troponin from the actin — that's called the latent period.

肌肉纤维被神经刺激后立即——钙离子涌入肌节，将肌动蛋白中保护原肌球蛋白和肌钙蛋白的蛋白带走——这称为潜伏期。

So the calcium latches on to the troponin and causes it to pull the other bodyguard protein — the tropomyosin — away from the sites on the actin strands that the myosin really wants to get its paws on.

所以钙锁住肌钙蛋白，并使其将另一种保护蛋白——原肌球蛋白——从肌球蛋白真正想要抓住的肌动蛋白链上的位置拉走。