| http://www.w3.org/ns/prov#value | - According to one preferred embodiment, SABM sequence of the above general formulae, particularly SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3and SEQ ID NO: 4, comprise additional amino acids at the N-terminus (Xaa)x and additional amino acids at the C-terminus (Xaa)z, wherein Xaa is an amino acid and x and z are a whole number greater or equal to 0 (zero), generally less than 100, preferably less than
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