| http://www.w3.org/ns/prov#value | - An isolated cDNA according to claim 6, wherein m is 4 to 10, n is 10 to 20, and p is an integer of 1 to 100 and each X, which may be the same or different, is selected from the group consisting of G, A, Q, Y and L, wherein at least 50% of the X's are G.
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