Patent ID: 7196063

Claim:
A compound of general formula I comprising the following components: X 1 —X 2 —{(X 3 ) a /X 4 /X 5 }—X 6 wherein: X 1 stands for a saturated or unsaturated fatty acid residue comprising 14 carbon atoms; X 2 is 0; X 3 consists of 1–2 positively charged amino acids; X 4 consists of 4 amino acids, of which 2 are aromatic amino acids, 1 is a polar uncharged amino acids and 1 is a hydrophobic aliphatic amino acids; X 5 consists of 8 amino acids, of which 4–5 are positively charged and 0–1 is negatively charged, 2 amino acid residues being polar uncharged amino acids, wherein the 2 amino acid residues form a cyclic structure and 1 polar uncharged amino acid; wherein the groups X 3 , X 4 and X 5 being located at various places in the compound; X 6 is a compound of general formula II wherein Z stands for a spacer group selected from the group consisting of alkane and alkene containing 1–5 carbon atoms, J stands for a functional group selected from the group consisting of amines, thiols, alcohols, carboxylic acids and esters, aldehydes and alkyl halides; U is 0 or a labeling group for specific binding selected from the group consisting of biotin and a group containing a substituent selected from the group consisting of a fluorescein, a radioisotope and a paramagnetic contrast agent; wherein: a stands for an integer of 1–2.