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| The tubular cristae of mitochondria (m) bear a pair of protrusions when seen in cross section (arrowheads). These are the F1 subunits of F1F0 ATP synthase enzymes which play a role in producing ATP, the cell’s main energy source. bb, basal bodies; kd, kinetodesmal fiber; sb, striated bands; ee, early endosome. EM taken on 3/7/80 by R. Allen with Hitachi HU11A TEM. Neg. 22,500X. Bar = 0.25µm. |
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