| 摘要 |
A fusion polypeptide is described having the amino acid sequence X-Y-Z, or portion thereof, comprising the amino acid sequence of a hedgehog (X); Y is an optional linker moiety; and Z is a polypeptide comprising at least a portion of a polypeptide other than hedgehog. It is preferred that X is a human hedgehog. Mutants of hedgehog are also described.
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