| 1. | Euglenophyte chloroplasts have a pyrenoid and thylakoids stacked in groups of three.
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| 2. | Inside cryptophyte chloroplasts is a pyrenoid and thylakoids in stacks of two.
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| 3. | There is substantial diversity in pyrenoid morphology and ultrastructure between algal species.
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| 4. | The cells are usually in diameter and with one pyrenoid.
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| 5. | However it is not yet known how the pyrenoid forms during cell division.
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| 6. | DIC image of " Scenedesmus quadricauda " with the pyrenoid ( central four circular structures ) clearly visible.
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| 7. | The mitochondrial lobe and chloroplast outer membrane both protrude into the pyrenoid matrix which is considered characteristic of the genus.
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| 8. | The classical paradigm, which prevailed until the early 1980s, was that the pyrenoid was the site of starch synthesis.
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| 9. | The pyrenoid matrix, composed primarily of Rubisco, in " Chlamydomonas ", they are seemingly encased in tubules.
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| 10. | In most species, this chloroplast is fused with other organelles to form a large pyrenoid that both manufactures and stores food.
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