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Figure 2
Evidence for a mixed dithiol–disulfide involving Cys35–Cys38. (a) The electron-density map at a 1σ level is depicted as blue chicken-wire. The positive and negative difference densities are shown as green and red chicken-wire, respectively, both at a 3σ level. The phases used for the calculation of these maps are derived from a model in which the Cys35–Cys38 disulfide was given full occupancy. (b) Here, depicted in similar fashion to (a), the reduced form of the Cys35–Cys38 pair was given full occupancy.

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
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