Patent ID: 8642560

Claim:
A library comprising a plurality of compounds of the formula R 1 -Cys-Z-Cys-R 2 (I), in which each of the two Cys is the residue of L-cysteine, the two -SH groups in the two L-cysteine residues being replaced by one -S-S- group, R 1 and R 2 comprise Glu-Thr and Thr-Lys; or Lys-Thr and Thr-Glu; or Thr-Glu and Lys-Thr; or Thr-Lys and Glu-Thr; or Leu-Glu and Lys-Val; or Val-Lys and Glu-Leu; or Glu-Leu and Val-Lys; or Lys-Leu and Val-Glu; or Glu-Leu-Lys and Glu-Val-Lys; or Lys-Val-Glu and Lys-Leu-Glu; or Leu-Glu-Lys and Glu-Lys-Val; or Val-Lys-Glu and Lys-Glu-Leu; or Glu-Lys-Leu and Val-Glu-Lys; or Lys-Glu-Val and Leu-Lys-Glu; or Lys-Glu-Leu and Val-Lys-Glu; or Glu-Lys-Val and Leu-Glu-Lys, and Z is a chain of from 6 up to and including 12 amino acid residues, each of these residues being, independently, the residue of a naturally occurring L-alpha-amino acid, with the proviso, that Z comprises one of the moieties -Lys-Trp-Phe-Ser-Asn-His-Tyr-Gln- [SEQ ID NO:23]; and -Phe-Leu-Ala-His-Tyr-Ala- [SEQ ID NO:24].