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. Author manuscript; available in PMC: 2009 Nov 20.
Published in final edited form as: J Mol Graph Model. 2008 Nov 8;27(7):759–769. doi: 10.1016/j.jmgm.2008.11.003

Fig. 6.

Fig. 6

Adenine (red) in the syn-orientation sterically clashes with the deoxyribose (green) and Pα (purple) when dATP is in the canonical “chair-like” shape S1-dNTP (panel A), while no such steric clash exists in the “goat-tail-like” shape S2-dNTP (panel B).