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Calcium ions are inactively imported from the cytoplasm into the ER.
Wiki User
∙ 11y ago
The endoplasmic reticulum (ER) contains a high concentration of Ca2+ ions due to the presence of specialized pumps (such as SERCA) that actively transport Ca2+ into the ER from the cytoplasm. This accumulation of Ca2+ within the ER is crucial for various cellular functions, including protein folding and lipid synthesis.
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