What is the primary conclusion of "domain-swapping" experiments with transcriptional regulatory proteins?

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Domain-swapping experiments involve exchanging domains between different transcriptional regulatory proteins to determine the functions of these domains. These experiments have shown that the DNA binding domains, which recognize and bind to specific DNA sequences, can be functionally distinct from the domains that mediate protein-protein interactions. Such interactions are often necessary for the formation of transcriptional complexes that regulate gene expression. The ability to separate these functions into different domains allows for modular assembly of transcription factors and the potential for combinatorial regulation of gene expression by various protein partners.

What Is the Primary Conclusion of "Domain-Swapping" Experiments with Transcriptional