evaluate the hypothesis that mutations in slc7a9 have a greater effect on the transport of cysteine across the plasma membrane of kidney cells than do mutations in slc3a1

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Answer:

The slc7a9 (Solute Carrier Family 7 Member 9) gene encodes for a protein that plays a critical role in the transport of cysteine in the kidneys, thereby a mutation in this gene may lead to health problems related to the urinary system. On the other hand, the SLC3A1 gene encodes a protein subunit which is required to form a transporter complex that is not involved in the transport of cysteine.