Extended Data Fig. 4: Circular dichroism results of CalC4_24 (a-b), CalC6_3 (c-d), and CalC6_H4 (e-f).
From: Bottom-up design of Ca2+ channels from defined selectivity filter geometry

a, c, and e, CD spectra at 25 °C (cyan lines), 95 °C (red lines), and cooled back to 25 °C (black lines). b, d, and f, CD melting curves at 222 nm.