Abstract
It is an important way of surveying the structure-function relationship of insulin to study insulins from different species. Based on the structure model of an orthorhombic crystal obtained by the molecular replacement method, the crystallographic refinement of a hexamer of silver carp insulin in an asymmetric unit has been carried out with 2.8 A resolution data using the restrained least-squares method. The comparisons of insulin structures have shown that the six silver carp insulin molecules have very similar but not identical three-dimensional structures which are similar to the known 2 Zn pig insulin structure but remarkably different in some local conformations.
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