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. 2017 Oct 9;114(45):11850–11855. doi: 10.1073/pnas.1711184114

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Fig. 4. — Structural evolution of the synthetic tubules formed by 2 upon irradiation with light. (A) Cryo-TEM picture before UV irradiation, (B) after 20 min of irradiation, (C) and after 60 min of irradiation in water (λ = 365 nm, c = 1.33 mM). The darker spherical objects are artifacts from the cryogenic medium. (D) Length distribution before UV irradiation (over 230 tubules), (E) after 20 min of UV irradiation (over 170 tubules), and (F) after 60 min of UV irradiation (over 800 tubules).