from the drop-down menu which type of regulation is occurring in each case. Select The Ixb12 gene sequence is in a region of condensed chromatin in fetal heart cells, but in adult heart cells, this region is uncondensed. This is an example of choose your answer... regulation. The lxb12 protein is activated by a kinase, which is an example of choose your answer... regulation. Trx25 mRNA is targeted for degradation by a protein that is present in liver cells but not in heart cells, which is an example of choose your answer... regulation. The Trx25 protein is inactivated by a protein that removes its phosphorylated residues, which is an example of choose your answer... ✓ regulation.

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