The parallel and convergent universes of polyketide synthases and nonribosomal peptide synthetases.

Polyketide synthases (PKSs) and nonribosomal peptide synthetases (NRPSs) catalyze chain elongation from simple building blocks to create a diverse array of natural products. PKS and NRPS proteins share striking architectural and organizational similarities that can be exploited to generate entirely new natural products.

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