| http://www.w3.org/ns/prov#value | - For example, ^G would represent all amino acids except Glycine, and [^ILMV] would represents all amino acids except I, L, M, and V. (4) Use ???x??? or ???X??? for a position that can be any amino acid. (5) Use ???(n)???, where n is a number, for multiple positions.
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