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US5942254A Phosphorylated recombinant human .beta.-casein expressed in a bacterial system 失效
在细菌系统中表达的磷酸化重组人β-酪蛋白

Phosphorylated recombinant human .beta.-casein expressed in a bacterial
system
摘要:
The present invention provides a plasmid containing a promoter sequence, a nucleotide sequence encoding an exogenous protein, and a nucleotide sequence encoding an enzyme capable of modifying the exogenous protein. In a specific embodiment of the invention the encoded exogenous protein is human .beta.-casein and the encoded enzyme is a human kinase capable of phosphorylating recombinant .beta.-casein in a bacterial system. Phosphorylated recombinant human .beta.-casein synthesized using the plasmid of the invention is shown to have the same bioactivity as native human .beta.-casein.
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