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. 2005 Aug 29;102(37):13013–13018. doi: 10.1073/pnas.0506181102

Fig. 2.

Fig. 2.

Femtosecond transients. (Upper) Overlay of femtosecond fluorescence up-conversion (trace A) and transient absorption (trace B) for the WT complex with boxB RNA labeled at position A7. (Lower) Both images show an instrument signal rise (t = 0 ps), followed by the measured decay transients (t = 0–200 ps). Femtosecond transient absorption decays measured for the complexes with N variants Glu-14–Arg-15 (trace A); Lys-14–Arg-15 (B); Lys-14–His-15 (C); and Lys-14–Gln-15 (D) (WT). These peptides were previously selected for binding boxB RNA (19).