My voyage of discovery to proteins in flatland …and beyond

2-(Pyridinyldithio)ethylcarbamoyl dextran (PDEC dextran) is developed herein as a novel biosensor coating material aimed for direct and facile fabrication of a sulfhydryl-specific capture surface on gold; the site-directed immobilization of a single free cysteine residue presented protein (human serum albumin, HSA) on PDEC dextran-coated surfaces without prior activation and subsequent specific binding of mouse monoclonal anti-HSA antibody to the resultant surface were demonstrated using surface plasmon resonance (SPR) assays.