Patent ID: 8729235

Claim:
A support for cell adherence and growth, comprising a polymer of a major ampullate spidroin protein, which major ampullate spidroin protein is consisting of from 150 to 420 amino acid residues and being defined by the formula REP-CT, wherein REP is a protein fragment having from 80 to 300 amino acid residues, wherein said fragment is selected from the group of L(AG) n L, L(AG) n AL, L(GA) n L, and L(GA) n GL, wherein n is an integer from 4 to 8; each individual A segment is an amino acid sequence of from 8 to 18 amino acid residues, wherein from 0 to 3 of the amino acid residues are not Ala, and the remaining amino acid residues are Ala; each individual G segment is an amino acid sequence of from 12 to 30 amino acid residues, wherein at least 40% of the amino acid residues are Gly; and each individual L segment is a linker amino acid sequence of from 0 to 20 amino acid residues; and CT is a protein fragment having from 70 to 120 amino acid residues and at least 80% identity to an amino acid sequence selected from the group consisting of SEQ ID NO: 4, amino acid residues 172-269 of SEQ ID NO: 9, and amino acid residues 172-269 of SEQ ID NO: 16.