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Synthetic molecular replicators: (a) von Kiedrowski's template-based replication (adapted from [46]); (b) Gadhiri's peptide ligation system (adapted from [47]). In (c), we show part of the replication mechanism presented in [48]. Here, a building block (R) containing two thiol functionalities leads to a mixture of growing cyclic structures. The hexamers self-assemble forming piled fibres that eventually break up. The number of fibres grows exponentially in time. Adapted from [48].
