A protein such as an enzyme or antibody is immobilized by crosslinking crystals of {HEAD ~ the protein} with {TAIL ~ a multifunctional crosslinking agent} 
with
A protein such as an enzyme or antibody is immobilized by crosslinking crystals of { HEAD ~ the protein } with { TAIL ~ a multifunctional crosslinking agent }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL