A peptide having the following amino acid sequence: Z1-LVRYTKKVPQVSTPTL-Z2(ALB-408) and itsbiolog-ically active fragments and/or variants and/or derivatives, especiallyamidated, acetylated, sulfated, phosphorylated and/orglyco-sylated derivatives, and peptides obtainable by multiple synthesis whichhave the biological activity of ALB408-423; wherein Zrepresents number of from 0 to 10 amino acid residues.