Abstract
Human growth hormone (hGH), whose main function is the somatic growth stimulation, induces diverse effects including lactation. We examined the possibility of hGH stabilization by elimination of its lactogenic activity. Chimeric GHs were constructed by replacement of different segments of hGH with sequences derived from non-lactogenic porcine GH. As was observed in the rat Nb2-11C lymphoma cell test, lactogenic activity of some chimeric hormones was seriously destroyed. This kind of hormones displayed the substantial increase in thermal and guanidine hydrochloride stability. The more stable hGH variants were found to be more soluble in Escherichia coli cells.
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