Question: Mouse embryonic stem cells divide extremely rapidly, about once every 5 hours. These cells require large amounts of threonine in their medium. Explain how threonine

Mouse embryonic stem cells divide extremely rapidly, about once every 5 hours. These cells require large amounts of threonine in their medium. Explain how threonine catabolism (Fig. 21-14) helps meet the cells' energy needs and their high rate of DNA synthesis.

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