| http://www.w3.org/ns/prov#value | - An isolated and purified protein comprising a glycine and proline rich repetitive ??s region that forms a ??-spiral, said ??s region represented by the following formula: (Gly-Pro-Gly-Gly-Ser-Gly-Pro-Gly-Gly-Tyr)n wherein n is an integer of at least 2. 20.
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