Patent ID: 8034897

Claim:
A recombinant spider silk protein comprising a) one or more synthetic repetitive spider silk protein sequences, wherein the synthetic repetitive sequence comprises between 5 to 50 repeat units and wherein (i) a repeat unit consists of the amino acid sequence of SEQ ID NO: 35 (module K) or variants thereof, (ii) a repeat unit consists of the amino acid sequence of SEQ ID NO: 37 (module sp) or variants thereof, (iii) a repeat unit consists of the amino acid sequence of SEQ ID NO: 39 (module X) or variants thereof, or (iv) a repeat unit consists of the amino acid sequence of SEQ ID NO: 41 (module Y) or variants thereof, wherein the variants in each case have up to 5 amino acid substitutions, deletions, insertions, and/or additions, which do not negatively affect tensile strength and elasticity of a thread formed from the recombinant spider silk protein.