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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Biochimie. 2014 Feb 26;102:83–91. doi: 10.1016/j.biochi.2014.02.011

Fig. 1. Structure and Predicted Recognition Sequence for PA1.

Fig. 1

A, Structure of PA1 and its EDTA conjugate. B, Target sequence for PA1 and alternative binding orientations. Closed circles = imidazole; open circles = pyrrole; open diamond = β alanine W=A/T. The arrowhead indicates the location of the polyamide tail and EDTA group. f refers to the forward binding orientation (amino terminus aligns with 5′ end of target sequence); r refers to the less favored reverse binding orientation (amino terminus aligns with the 3′ end of the target sequence.