| http://www.w3.org/ns/prov#value | - t, porcine, non-human primate, equine, murine, and ovine rPTK and alleles or other naturally occurring variants of the foregoing and human rPTK; derivatives of rPTK or its fragments as defined above wherein rPTK or its fragments have been covalent modified, by substitution, chemical, enzymatic, or other appropriate means, with a moiety other than a naturally occurring amino acid; and glycosylation
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