3. MyoD is a transcriptional activator that turns on the expression of several muscle specific genes in human cells The Id gene represses the function of MyoD. There are 2 possibilities: 1. Id protein directly represses the expression of these muscle specific genes. 2. Id inhibits muscle specific genes indirectly by preventing MyoD's function. If you knew Id's protein sequence, how can you figure out if explanation 1 or 2 is true?

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