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The Thermus thermophilus Rieske protein (TtRP) contains a 2Fe-2S cluster with one iron (Fe-Cys) coordinated by four sulfur atoms (2xS2− and 2xCys) and one iron (Fe-His) by two sulfur and two nitrogen atoms (2xS2−, His134 and His154). Here, the protein is investigated at three pH values (6.0, 8.5 and 10.5) in order to elucidate the protonation states of the His-ligands. Examination of the effect of...
Stiff skin syndrome is a rare cutaneous disease, scleroderma-like disorder that presents in infancy or early childhood with rock-hard skin, limited joint mobility, and mild hypertrichosis. Normally, it occurs in the absence of visceral or muscle involvement. Patients do not present immunologic abnormalities or vascular hyperactivity. We describe two adults who initially were diagnosed suffering from...
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