| http://www.w3.org/ns/prov#value | - The term isolated as used herein additionally refers to a nucleic acid or polypeptide that may be substantially free of chemical precursors or other chemicals when chemically synthesized. [0170] As used herein, a variant of polypeptide X refers to a polypeptide having the amino acid sequence of polypeptide X with one or more altered amino acid residues.
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