BIOL 112 Lecture : 8 - Endosymbiotic Organelles.docx

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BIOL 112 Full Course Notes
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BIOL 112 Full Course Notes
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Symbiont - two organism depend/live among each other. Mitochondria have outer plasma membrane and highly folded inner membrane. Inner folds have large proteins used in cellular respiration. Similar to mitochondria (outer membrane and inner membrane) They have a stacks of membranes derived from inner membrane - where proteins and enzymes are found for photosynthesis and carbon fixation. At the start of evolution chloroplast/mitochondria were individual cells, since they have a double membrane and their own dna/genome and own ribosome (similar to eubacteria). Another cell perhaps attempted to engulf it through endocytosis. The nucleus, then the golgi, are most related to the endomembrane system. The cell membrane is not part of the system, but closely related. Can act as a tract for motor proteins. Myosin - large protein w/ head and tail domain. Tail domain forms a coiled coil (2 alpha helices wrapped around) forming a dimer, (bipolar complex heads/heads in opposite directions)

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