Describe intragenic complementation and the concept of cistron.

Question

10 Feb 2025

Answer :

Word Count : 464

Intragenic complementation is a genetic phenomenon where different mutant alleles of the same gene (within the same cistron) interact functionally to produce a partially or fully functional protein. This concept is particularly significant in multimeric proteins, where different subunits interact to form a functional enzyme or structural protein.

Intragenic Complementation

Intragenic complementation occurs when two different mutations within the same gene, when present together in a heterozygous or heteroallelic state, restore partial or complete functionality. This phenomenon is particularly observed in genes encoding proteins that function as dimers or multimers. In such cases, mutations in different domains of the protein may still allow proper folding and interaction of subunits, leading to the restoration of function.

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