Extended Data Figure 4: Records of TFIIH scanning on SNR20* long with rNTPs or dATP.
From: Real-time observation of the initiation of RNA polymerase II transcription
a, b, Just as for SNR20* short (Fig. 3), the longer promoter shows TFIIH scanning with both rNTPs (a) or dATP only (b), after which either the PIC dissociates (black arrows), or the bubble collapses to the closed (blue and green records) or open (grey line) complex and TFIIH moves again. The dashed line indicates the position of the TSS (+1).
