The construction of protein-like folding motifs as structurally stable scaffolds for the introduction of function represents a major goal in protein design. The use of topol. templates allows the bypass of the well-known folding problem of linear polypeptides and offers a way to mimic native packing topologies by the template directed self-assembly of helical and/or b-sheeted peptide blocks. In conceptually sepg. structure from function, a chimeric 4-helix bundle TASP (Template Assembled Synthetic Protein) derived from the ROP protein and the cell adhesion glycoprotein E-selectin has been designed and synthesized, aimed at inhibiting an early stage in cell adhesion processes, in particular leukocyte adhesion. [on SciFinder (R)]