| http://www.w3.org/ns/prov#value | - wherein X is an amino acid selected from the group consisting of glycine, lysine, D-lysine, ornithine, D-ornithine glutamic acid, D-glutamic acid, aspartic acid, D-aspartic acid, cysteine, D-cysteine, tyrosine and D-tyrosine; and Z is a substituent selected from the group consisting of Gly-NH2, ethylamide, and Aza-Gly-NH2.
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