I think it is the nucleus and the endoplasmic reticulum.
The endoplasmic reticulum (ER) is the internal membrane system responsible for protein synthesis, primarily categorized into rough ER, which has ribosomes for synthesizing proteins, and smooth ER, which plays a role in lipid synthesis. The ER is located near the nucleus, facilitating communication and transport within the cell. This system is essential for producing proteins needed for various cellular functions.
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