Answers are grounded in this paper and cite their sources.
Abiotic but bioactive: Folding aromatic amide oligomers possessing helical structures very different from those of α-peptides, β-peptides, or peptoids nevertheless show comparable abilities to penetrate into cells, as well as low toxicity and complete resistance to protease degradation. TFA−=trifluoroacetate.
No takes yet. Share an insight, caveat, or question.
Gillies et al. (2007) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: