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Polycistronic mRNA contains multiple genes, typically found in prokaryotes, which are translated into different proteins.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance Human Genome Project and DNA Fingerprinting
Polycistronic gene organization places multiple open reading frames under a single promoter and operator, producing one transcript bearing several independent cistrons each with its own Shine-Dalgarno ribosome binding site and start codon for independent initiation. This architecture characterizes most bacterial operons such as lacZYA, trpEDCBA, and bacteriophage genomes, enabling coordinated stoichiometric expression of functionally related proteins in response to one regulatory decision conserving regulatory economy. Eukaryotic nuclear transcripts are overwhelmingly monocistronic, requiring
Ref: Alberts Chapter 7 Operons - polycistronic mRNAs characteristic of prokaryotes; NCBI Genetics definition of operon
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