Assertion: mitochondrion's membrane | /r/HasProperty | fig. 1a
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Source sentences:
text: On the outer membrane, a subset of Dnm1- or Drp1-containing puncta are directly associated with sites of mitochondrial constriction and fission (10, 21, 22, 72), suggesting a multistep pathway for mitochondrial fission in which Dnm1 or Drp1 structures assemble, are targeted to mitochondria, and, at a rate-limiting step in the pathway, mediate the division of the mitochondrial membranes (Fig. 1A).