| http://www.w3.org/ns/prov#value | - pyroGlu-His-Trp-Ser-Tyr-X-Leu-Arg-Pro, wherein X is an amino acid selected from the group consisting of lysine, D-lysine, ornithine, D-ornithine, glutamic avid, D-glutaniic acid, aspartic acid, D-aspartic acid, cysteine, D-cysteine, tyrosine and D-tyrosine. 2.
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