This packing is combining a protein such as avidin and ovomucoid to the support via a straight or branched spacer optionally having...http://www.google.com/patents/US5354461?utm_source=gb-gplus-sharePatent US5354461 - Packings combining protein to a support via a spacerAdvanced Patent SearchPublication numberUS5354461 APublication typeGrantApplication numberUS 08/039,511Publication dateOct 11, 199