The invention provides an isolated nucleic acid encoding a water-soluble polypeptide fragment of human tryptophanyl-tRNA synthetase, which is useful for the inhibition of angiogenesis. The nucleic acid comprises a polynucleotide of SEQ ID NO: 6, a polynucleotide hybridizable to SEQ ID NO: 6, a polynucleotide that encodes the polypeptide of SEQ ID NO: 7, a polynucleotide that encodes a polypeptide of SEQ ID NO: 12, a polynucleotide that encodes a polypeptide epitope of SEQ ID NO: 7, or a polynucleotide that is hybridizable to a polynucleotide that encodes a polypeptide epitope of SEQ ID NO: 7. Vectors and recombinant cells comprising the nucleic acid are also provided.

 
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> Self assembling proteins for producing extended materials

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