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| Myoneme of O. coarctata. Such fibrous bundles are known to be composed of centrin, a filament that contracts when exposed to calcium. The ER (er) is closely associated with the myonemes and sends specialized decorated tubules onto the surface or into the fibrous bundle (arrows). per, peroxisome, typically has one luminal tubule. m, mitochondrion. EM taken on 6/13/69 by R. Allen with Philips 300 TEM. Neg. 30,200X. Bar = 0.25µm. |
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