Abstract
This paper gives an overview of methods available for, and difficulties encountered in the preparation of synthetic oligonucleotide combinatorial libraries. The application of libraries immobilized to high-load beads to the screening of specific two-component (nucleic acid / nucleic acid) and three-component (ds nucleic acidprotein) interactions is described. The effector oligonucleotides immobilized to a single bead are identified by direct Maxam-Gilbert sequencing.