Abstract: The invention pertains to a printable hydrogel that can both immobilize and stabilize a wide range of biomolecules and/or cells on a substrate while restricting the access of surrounding chemicals to the biomolecule active site. Such hydrogels can be adapted to high-throughput screening applications and can discriminate between true inhibitors and promiscuous aggregating inhibitors as well as enable the determination of dose-response relationships of biomolecule and/or cell inhibitory chemicals with high accuracy.