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the oocyte in a paracrine fashion. Mural granulosa cells (MGC) line the follicular wall and surround the fluid-filled antrum. The oocyte secretes factors that determine the functional differences between CCs and MGCs. CCs primarily support growth and development of the oocyte whereas MGCs primarily serve an endocrine function and support the growth of the follicle. Cumulus cells aid in oocyte development and show higher expression of SLC38A3, a transporter for amino acids, and Aldoa, Eno1, Ldh1, Pfkp, Pkm2, and Tpi1, enzymes responsible for glycolysis.

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