The porous cellulose beads, which may be cross linked, if desired, by suitable treatment, are {TAIL ~ useful carriers} to which {HEAD ~ enzymes} can be immobilized 
to immobilized
The porous cellulose beads , which may be cross linked , if desired , by suitable treatment , are { TAIL ~ useful carriers } to which { HEAD ~ enzymes } can be immobilized
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL