Patent ID: 7951908

Claim:
A recombinant spider silk protein comprising one or more synthetic repetitive spider silk protein sequences, wherein the synthetic repetitive sequence comprises between 5 to 50 repeat units, and wherein (i) the repeat unit consists of the amino acid sequence of SEQ ID NO: 3 (module A) or variants thereof, (ii) the repeat unit consists of the amino acid sequence of SEQ ID NO: 4 (module Q) or variants thereof, (iii) the repeat unit consists of the amino acid sequence of SEQ ID NO: 3 (module A) or variants thereof and is combined with the repeat unit consisting of the amino acid sequence of SEQ ID NO: 4 (module Q) or variants thereof, or (iv) the repeat unit consists of the amino acid sequence of SEQ ID NO: 4 (module Q) or variants thereof and is combined with the repeat unit consisting of the amino acid sequence of SEQ ID NO: 3 (module A) or variants thereof and is combined with the repeat unit consisting of the amino acid sequence of SEQ ID NO: 4 (module Q) 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.