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