Fig. 1From: Origins for EveryonePeptide replicators. A Leucine zipper peptides templating their own coupling from half molecules (red electrophile substrate and blue nucleophile substrate). B Peptide hypercycles. Green represents a peptide with, say, valine in a key position, while red represents a peptide with an isoleucine in the same position. Unlike nucleic acids, they are capable of efficient cross-replicationBack to article page