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Cloning, Expression And Purification Of Atlantic Salmon (< i> Salmo salar, L.) Neuroglobin.

Protein Expr Purif.. 2012-12; 86(2):151-156

Bjørlykke GA, Kvamme BO, Slinde E, Raae AJ. University of Bergen, Department of Molecular Biology, Bergen, Norway.

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摘要

Neuroglobin (Ngb) exists only in small amounts in salmon brain. In order to study the protein in more detail salmon neuroglobin (sNgb) was cloned, heterologously expressed in Escherichia coli and purified. The protein had red color and showed the characteristic peaks at 411nm (metNgb), 415nm (carboxyNgb) and 424nm (deoxyNgb). Western analysis showed that sNgb reacted weakly against a rabbit anti human neuroglobin (hNgb) and strongly to a sNgb specific antibody. Our 3D-homology model of the sNgb indicated modifications adjacent to and in the O(2)/CO binding site. This may correlate to differences in substrate affinities for the sNgb compared to the hNgb. Also sNgb contained shorter helixes and longer interhelica... More