Fecha de publicación: 12/04/2007 Fuente: WIPO "apis mellifera" A substantially purified and/or recombinant silk polypeptide is provided, wherein at least a portion of the polypeptide has a coiled coil structure and wherein the polypeptide comprises a sequence selected from:i) an amino acid sequence as provided in any one of SEQ ID NOs:1-8, 22-29, 40-47, 56-63, 72, or 73;ii) an amino acid sequence which is at least 40% identical to any one or more of SEQ ID NOs:1-8, 22-29, 40-47, 56-63, 72, or 73; andiii) a biologically active fragment of i) or ii).