In the News & Views 'Foldamers wave to the ribosome', multiple changes to the main text were required. In paragraph 2 "whose monomer sequence is truly defined" should have read "whose monomer sequence is both diverse and truly defined" and "Truly sequence-defined..." should have read "Diverse and truly sequence defined…". In the penultimate paragraph, 'appendages 5-9' should have been "appendages 5 and 7-9"; in the sentence starting "Based on these criteria...", QPQ should have been QQQ and vice versa; and the whole sentence starting "What is interesting..." needed revising to "What is interesting is that an alternating sequence with a terminal P monomer appears essential: PQPQ is unfolded and an initiator tRNA carrying PQPQ-Gly-Phe initiates translation, whereas QPQPQ is folded and does not." Furthermore, the structures in Fig. 1a have been replaced to correct several errors in the chemical structures arising from missing -CH2- groups. The table in Fig. 1b also required changes: in the last two columns of row two, 'Fast' and 'No' should have read 'Slow and 'Yes', respectively; in the first column of row three, 'ND' should have been a tick; and in the last two columns of row four, 'Slow' and 'Yes' should have read 'Fast' and 'No', respectively. Finally, a new reference 'Milon, P. et al. EMBO Rep. 11, 312-316 (2010).' has been added to the reference list at number 13 and cited in the fifth paragraph, the references list has been renumbered accordingly.