Additional file 1.

Dimethylarsenic cysteine modifications. Five cysteine residues are modified through a reaction with the sodium cacodylate and dithiothreitol in the crystallization buffer, resulting in addition of dimethylarsenic to the cysteine thiols. Experimental anomalous difference density contoured at 5 σ is shown superimposed onto the refined guanylate cyclase structure. Sidechains are show as stick figures and colored as follows: carbon, green; sulfur, yellow; arsenic, violet.

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Winger et al. BMC Structural Biology 2008 8:42   doi:10.1186/1472-6807-8-42