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wHTH motif found in two structural homologs from STIV and SSV1. The overall folds of STIV F93 (left, PDB ID 2CO5 [28]) and SSV1 F93 (right, PDB ID 1TBX [29]) highlight the components of the wHTH motif, including (in order of N- to C-terminal) α1 (red), α2 (orange), α3 (the recognition helix, yellow), and a β-sheet (pink, comprising β2, β3 for STIV F93 and β1, β2 for SSV1 F93).
